Commit Graph
470 Commits
Author SHA1 Message Date
Evan JarrettandClaude Opus 5 2984331f0c hold/gc: test the blob sweep, and give the S3 mock object ages
deleteOrphanedBlobs is the only part of GC that removes bytes and it had no
test. It could not have had one: object age decides whether a blob is
deletable, the in-process harness stamps every object with time.Now(), and
MockS3Client's ListObjectsV2 set no LastModified at all. Neither could express
"this blob is nine days old", so both halves of the grace rule went
unexercised — including the half that protects a push still in flight.

MockS3Client gains ObjectTimes, a per-key LastModified consulted by
ListObjectsV2. Keys with no entry list without a timestamp exactly as before,
so existing tests are unaffected. It also gains DeleteObjectError, matching
the error injection the other operations already had.

Four cases, three of which are reasons NOT to delete: an old unreferenced
blob goes; a young unreferenced blob stays; a referenced old blob stays; a
/link object is never treated as a blob. Plus a failure case pinning that one
undeletable object does not abort the walk, and that a blob which never left
storage is not counted as deleted or reported as reclaimed space.

Verified by mutation. Disabling the grace check deletes the young blob;
disabling the referenced check deletes the live one; both fail. Disabling the
/data suffix check changes nothing, because extractDigestFromPath anchors on
/data$ and rejects everything else — so that check is a redundant early-out
rather than a guard, and the test says so rather than implying otherwise.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-25 16:34:25 -05:00
Evan JarrettandClaude Opus 5 4542897f08 hold/gc: escape the DID in listRecords/getRecord repo parameters
fetchUserManifestsFromEndpoint, fetchUserTags and fetchUserProfile
interpolated the user DID straight into a query string. A did:web carrying a
port spells that port as a literal %3A, so the PDS received the parameter
decoded back to ":" — a different DID, matching no repo. listRecords then
answers 200 with an empty list and GC reads it as "this user has no
manifests": every blob they own drops out of the referenced set and is
deleted once past the seven-day blob grace.

There is no error and no status code to notice, which is the same soft
failure 95d4f7c fixed one function away in this file. getRecord for
manifests and checkPredecessorAt already escaped; three of the five call
sites did not.

Scope is local testing only. did:plc, which every production user has,
contains nothing that needs escaping, and did:web with a port is not really
valid in atproto — but it is what the dev stack runs on, so GC there sees a
referenced set of zero and considers every blob in the bucket collectable.
That made it impossible to validate the sweep end to end, which is how it
surfaced.

Found by test/integration/gc_test.go, added here: it pushes an image and
asserts GC accounts for every blob the push wrote. The blob grace period is
a package constant, so nothing pushed during a test can age past it and "no
orphans" is vacuous; the load-bearing assertion is referenced == total,
which grace does not touch. Against the unescaped code it reported
referenced=0 of 4.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-25 16:34:25 -05:00
Evan JarrettandClaude Opus 5 891ad01de3 hold/gc: require a predecessor's successor to name this hold
2e55352 taught the scan broadcaster that a successor label is only
interesting when it points at us; the GC copy of the same check was left
accepting any non-empty successor. Confirmed still divergent at the head of
this stack: gc.go was a bare `if captain.Successor != ""` while
scan_broadcaster.go:1473 compares against sb.holdDID.

A hold that retired into some third hold is that hold's predecessor, not
ours, and its manifests are not a reason to keep blobs referenced here. GC
therefore now makes the same comparison the broadcaster does, against
gc.pds.DID().

This is the one change in the batch that makes GC delete more rather than
less, so it is deliberately its own commit and carries a floor. If this hold
cannot say who it is, ourHoldDID() returns "" and the old permissive answer
stands: we cannot conclude a successor is not us, and over-protecting merely
leaks blobs while guessing the other way destroys them. That branch has its
own test, because an empty DID silently turning every predecessor into a
stranger is exactly how this reconciliation would become the next blob-loss
bug.

The inconclusive-on-failure semantics 95d4f7c added are untouched: only the
answers from a hold that actually replied are affected.

Verified by mutation: forcing the comparison back to the permissive form
fails exactly one case, the successor naming a third hold, and leaves the
unknown-own-DID fallback passing.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-25 16:34:25 -05:00
Evan JarrettandClaude Opus 5 48eee49ef9 hold/gc: cover checkPredecessorAt and the unresolved-holds reset
95d4f7c split the fetch-and-parse half of the predecessor probe into
checkPredecessorAt precisely so it could be tested against a local server,
but no test ever followed. The paths that had none are the ones that used to
delete another hold's blobs: a 500, a refused connection, a body that is not
JSON, and an envelope wrapping a garbage record all have to report
definitive=false, because only a definitive answer is allowed into the
process-lifetime predecessorCache.

Verified by mutation rather than by passing: flipping the six failure-path
returns in checkPredecessorAt to definitive=true, which is the pre-95d4f7c
semantic, fails all four cases.

Also pins the reset that the predecessorUnresolved field documents but
nothing enforced. Removing the clear at the top of analyzeRecords makes the
test fail, which is the point: without it one outage is permanent, every
later run short-circuits on the stale entry, and GC silently stops
reclaiming anything that hold's manifests touch.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-25 16:34:25 -05:00
Evan JarrettandClaude Opus 5 bb45a80d51 hold/pds: cover the scanner-disconnect teardown 05b856b fixed
newTestScanBroadcaster builds the struct with only a database, so nothing in
the suite ever reached handleWriter, handleReader, or the Unsubscribe teardown
they share — which is precisely what 05b856b changed. These give the subscriber
a real WebSocket so the teardown actually runs.

The invariant is the one Unsubscribe documents: a dropped scanner unwinds both
goroutines and each calls Unsubscribe, so everything past the `found` guard must
happen exactly once. Closing `done` twice panics and takes the hold down with
it, and re-running the requeue UPDATE would unassign jobs a replacement scanner
had already claimed.

Three cases: Unsubscribe called twice on the same subscriber, handleWriter
releasing and closing the connection once done is closed, and the real shape of
a scanner vanishing — client closed, both goroutines unwinding into the same
subscriber, plus a late duplicate Unsubscribe after the fact.

Passes -race -count=5.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-25 16:34:25 -05:00
Evan JarrettandClaude Opus 5 8cd59a61f1 appview: stop a UI session outliving the OAuth session behind it
Only one oauth_sessions row is kept per account, so signing in again — on a
second device, or simply a second time — replaces it and leaves every earlier
ui_sessions row pointing at an oauth_session_id that no longer exists. Get
checked only expiry, so those still read back as usable.

Found on a live appview: four ui_sessions rows, three orphaned, and requesting
/settings/user with an orphaned cookie returned 200 with the account's handle
rendered throughout, where an anonymous request gets a 302. The browser looks
signed in while the credential behind it is gone, so every PDS-backed action
fails against a UI insisting the session is fine. It now fails closed and sends
the user back through login.

Get also never checked ownership. oauth_sessions is unique on
(account_did, session_id), so the existence check is scoped by both; matching
session_id alone would let one account's live OAuth session validate another
account's dangling reference. That has its own test.

An empty oauth_session_id stays valid, since Create makes sessions that never
had one, and a test pins that so the check cannot start rejecting them.

TestSessionStore_CreateWithOAuth referenced an OAuth session it never inserted,
which is an orphan by definition, so it now creates the row. Its intent was
that CreateWithOAuth persists the ID; it relied on the orphan behaviour only
incidentally. Its not-found branch used t.Error and then dereferenced the nil
session, so that is now t.Fatal.

Pre-existing at efabb677 rather than introduced by this range.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-25 16:34:25 -05:00
Evan JarrettandClaude Opus 5 c9f8b4178c credhelper: stop dev builds nagging about an update to themselves
isNewerVersion split versions on "." and ran each component through
strconv.Atoi, discarding the error and substituting 0. For a git-describe
build the last component is "4-18-g8f70cce", which does not parse, so it
became 0 and every published release compared as newer. Running
v0.1.4-18-g8f70cce printed "Update available: v0.1.4" on every single
invocation, naming a version the binary was already 18 commits past.

Versions are now parsed properly: the "-<commits>-g<sha>" tail is recognised
and kept as a count of commits past the tag, and a version that cannot be
read in full returns false rather than being silently treated as 0. That
second part is the actual root cause — the comparison could not distinguish
"this component is zero" from "I could not read this component".

Ordering for a git-describe build is deliberately not semver, where a
prerelease sorts below its release. Such a build is commits AHEAD of its tag,
so v0.1.4-18-g8f70cce is newer than v0.1.4 and older than v0.1.4-20-gabc1234.

The function had no tests. Both failing cases are pinned along with the
ordinary release comparisons, so the git-describe handling cannot regress the
normal upgrade path.

Pre-existing at efabb677 rather than introduced by this range.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-25 16:34:25 -05:00
Evan JarrettandClaude Opus 5 f8d9ad7fe9 appview: let a registry domain keep its port, and its /v2
DomainRoutingMiddleware normalized the request Host to a bare hostname but
matched server.registry_domains verbatim, so any configured domain carrying a
port could never match. config-appview.example.yaml ships
`registry_domains: [127.0.0.1:5000, atcr.io]`, which means that entry has been
inert since it was written.

It fails closed in the worst way. That same host is also the auto-detected UI
host, and `host == uiHost` was evaluated first, so /v2/* was answered with
"registry API is not available on this domain, use 127.0.0.1:5000" — naming the
exact host the client had just used. The registry API is unreachable on the dev
stack, and any single-host deployment hits the same wall: listing a host in
registry_domains does nothing if it is also the UI host.

Both sides are now normalized through hostWithoutPort, and a registry domain
takes /v2/* even when it doubles as the UI host, which is a legitimate
single-domain deployment. Everything else is unchanged: a UI-only host still
refuses /v2/, registry domains still redirect non-/v2 traffic to the UI, and
/auth/token and /auth/device/* are still served directly so a cross-host 307
cannot strip the Authorization header.

hostWithoutPort uses net.SplitHostPort instead of the previous LastIndex(":")
scan, which mangled bracketed IPv6 literals into "[::1" and could never match
the "::1" that url.URL.Hostname() yields for the UI host.

The middleware had no tests at all. The two failing cases are pinned first, and
the four pre-existing behaviours are pinned alongside them so the reorder
cannot quietly widen what /v2/ is served on.

Pre-existing at efabb677 rather than introduced by this range, but it blocks
every registry-facing batch in the stack, so it lands at the base.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-25 16:34:25 -05:00
Evan JarrettandClaude Opus 5 4c04983e23 appview: stop the backfill claiming every user was just active
last_seen means "this user did something recently". The backfill walks every
historical record in the network, so stamping it there recorded when the
backfill ran, not when the user was active — for every user at once, on every
run. That destroys the only signal the column carries, and it is the one column
in users that nothing upstream can rebuild.

It is now written on the two paths that represent real activity: an interactive
login, and a live commit event on the firehose, which does mean the user just
wrote a record. The backfill still corrects handle, PDS endpoint and avatar,
which is why it re-resolves rather than trusting a cache; it just no longer
claims the user was present.

UpsertUser grows an options form rather than a fourth named variant, since the
avatar and last_seen decisions are independent and all four combinations occur.

Anyone computing MAU from this column should know it was unreliable for every
backfill run before this change.

Also corrects docs/HORIZONTAL_SCALING.md, which claimed oci_client and
registry_domain were local-only preferences. They are fields on
io.atcr.sailor.profile: settings writes them to the user's PDS and
ProcessSailorProfile refreshes the local cache. users is fully derived apart
from last_seen.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-12 09:24:26 -05:00
Evan JarrettandClaude Opus 5 13edb7184d appview: stop writing last_seen and last_used on every event
Neither is a correctness problem; both are round trips on hot paths for
timestamps nothing reads at that resolution.

UpdateUserLastSeen ran per Jetstream event for cached users, so once per indexed
record. DeviceStore.UpdateLastUsed ran per /auth/token call, so once per docker
push and pull including each layer's re-auth. Cheap against a local file, a
network round trip each against a remote primary, and the second sat on the
authentication path.

Both are now throttled to once per five minutes per subject. The MAU queries and
the admin views work in hours or days, so nothing loses meaning. The throttle
state is per-process and lost on restart, costing at most one extra write per
subject per boot; only the lease holder runs the consumer, so exactly one process
is doing the first of these at a time.

UpdateLastUsed stamps the throttle before writing rather than after, so a slow or
failing write cannot let every concurrent layer upload through to pile on more of
them.

Verified by disabling the throttle: 50 back-to-back calls then rewrite the
timestamp every time.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-12 09:14:45 -05:00
Evan JarrettandClaude Opus 5 e9d43aa767 db: cover the recency change on all four surfaces, not one
The MAX(id) replacement touched four queries that each carry their own copy of
the same CTE: SearchRepositories, GetRepoCards, GetUserRepoCards and
GetStarredRepoCards. Only the third had a test. Fixing one and missing another
would leave the UI disagreeing with itself about which manifest is current,
depending on which page you were looking at.

All four now assert that recency follows created_at rather than insert order,
and that a tie between manifests pushed in the same second resolves the same way
on every surface. Verified by regressing the CTEs back to rowid ordering: each
of the four fails independently.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-12 09:10:19 -05:00
Evan JarrettandClaude Opus 5 454a6bad3d db: key manifests by manifest_key and drop the rowid
Completes the swap 0033 set up. layers and manifest_references move onto
manifest_key and manifests.id is gone, which removes the last node-allocated
identifier in the AppView schema.

Statement order in 0034 is load-bearing. With foreign keys on, DROP TABLE
performs an implicit DELETE FROM, so dropping manifests while layers still holds
an ON DELETE CASCADE reference deletes every layer row. Migration 0009 did
exactly that; it went unnoticed because the Jetstream backfill rebuilds layers
from PDS records, so the damage healed itself. PRAGMA foreign_keys is no help:
it is a no-op inside a transaction and migrations run in one. So the new
children are built pointing at manifests_new, the old children are dropped
first, and only then is the old manifests table dropped, by which point nothing
references it. Verified both behaviors before relying on them.

manifest_key is declared NOT NULL as well as PRIMARY KEY, because in SQLite a
PRIMARY KEY column still accepts NULL unless it is INTEGER PRIMARY KEY. That
constraint immediately caught four test helpers inserting manifests without one.

Five queries used MAX(id) as "the newest manifest in this repo", which I had
previously reported as absent after grepping only for ORDER BY. A derived key
has no ordering, so recency now comes from created_at with manifest_key as a
deterministic tiebreak. This is a real behavior change, and a fix: the two
disagree whenever a manifest is indexed out of order, which the backfill does
routinely, and created_at is the push time these queries always wanted. Both
directions are tested, including that ties resolve the same way every run.

InsertManifest and BatchInsertManifests no longer read anything back. The key is
derived from (did, repository, digest), so the writer knows it before the
statement runs: the select-back, its per-DID IN list, and the "manifest missing
id after batch insert" branch all go away, along with the UNIQUE-conflict
fallback that existed only to recover a rowid.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-11 22:44:41 -05:00
Evan JarrettandClaude Opus 5 11b85e5102 db: fill manifest_key inside its migration, not at runtime
0033 added the column and left the fill to the Jetstream backfill. That is fine
for a running system and wrong for replay: a database several releases behind
runs every pending migration back-to-back at boot, long before any worker
starts. Anything built on top of manifest_key would, on that path, silently
operate on NULLs while working perfectly on a system that had been up for a
while. Establishing a migration's data precondition out-of-band means replay
cannot see it.

The runner now supports a Go step per migration version, running inside the same
transaction as that migration's SQL, after the DDL it depends on and before the
version is recorded. A version is never recorded without its Go half.

0033's step fills manifest_key for every row lacking one. It has to be Go: the
value is a truncated sha256 and SQLite has no hash builtin. It pages through the
table and writes one UPDATE ... CASE per 500 rows, because a statement per row
would be correct and unusably slow against a remote primary.

Verified by unregistering the hook: replay then leaves 3 of 3 seeded manifests
with NULL keys. With it, all three are filled, from a snapshot of the pre-0009
schema forward.

The upserts keep their "OR manifests.manifest_key IS NULL" clause. It is a
self-healing net for rows that somehow arrive without a key rather than the
mechanism anything depends on.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-11 22:30:55 -05:00
Evan JarrettandClaude Opus 5 802cc4ba96 db: add manifest_key and let the existing backfill populate it
First half of replacing manifests.id with a node-independent identity. Nothing
depends on the column yet: id is still the primary key, and layers and
manifest_references still reference it. Getting the column in place and filled
first means the eventual swap operates on data that is already complete and
already proven unique, instead of doing the fill and three table rebuilds in one
step.

The value cannot be computed by the migration. It is a truncated sha256, SQLite
has no hash builtin, and go-libsql exposes no way to register one. So the fill
uses machinery that already exists: the Jetstream backfill re-upserts every
manifest across the protocol on startup, and both upsert paths now write
manifest_key.

That only works because of one extra clause. Both upserts guard their DO UPDATE
with a WHERE that skips rows where nothing changed, which on a backfill re-run is
nearly every row, so they would have skipped the very manifests that need
filling. Adding "OR manifests.manifest_key IS NULL" is what makes an otherwise
no-op pass populate the column. Verified by removing it: the backfill then fills
zero of three manifests instead of three of three.

The index is UNIQUE even though the column is nullable. SQLite treats NULLs as
distinct, so unfilled rows coexist while every filled row is checked. That makes
production data verify the 16-byte truncation rather than us assuming it: if two
manifests ever derived the same key, it fails loudly at insert instead of
silently attaching one manifest's layers to another after the swap.

AppView logs the unfilled count at startup, since there is no single moment at
which this becomes complete and the follow-up migration is only safe at zero.

ManifestKey replaces the old fat "did|repo|digest" map key rather than sitting
beside it; they were always the same question, answered without asking the
database.

The jetstream tests hand-maintained their own CREATE TABLE statements, which is
the drift problem moved into a test: the copy had already fallen behind (it still
had tags.id) and only failed once a query touched the difference. They use
db.InitDB now, with foreign keys switched off to preserve the behavior the
hand-rolled schema had.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-11 22:17:07 -05:00
Evan JarrettandClaude Opus 5 f186760847 db: drop the vestigial tags.id
Nothing joined on it. It was selected into a struct field no caller read, and
used only by DeleteTagsNotInList, which fetched surrogate ids, filtered them in
Go with a nested loop over the keep list, and issued one DELETE per row. The
natural key was already enforced by UNIQUE(did, repository, tag), so that
becomes the primary key and the column goes.

An AUTOINCREMENT rowid is allocated by whichever node performs the insert. That
is fine while every write funnels through one writer and stops being a stable
identity the moment they do not, so removing an identifier nobody used is the
cheapest way to shrink that surface before local-write replicas.

DeleteTagsNotInList now diffs against a set and deletes in batches. It still
reads the current tags first rather than issuing one NOT IN over the keep list:
that would need two placeholders per kept tag and would break past the driver's
parameter ceiling for a user with enough tags, and it cannot be chunked, because
each chunk would delete the tags every other chunk meant to keep. An explicit
delete list chunks safely.

idx_tags_did_repo is dropped rather than recreated: the new primary key indexes
(did, repository) as a prefix. It existed only because the primary key used to be
the surrogate id.

The rebuild names its columns explicitly. Column order is not guaranteed to
match between a fresh install and a migrated one, so INSERT ... SELECT * here
could write values into the wrong columns. TestMigration0032PreservesTagRows runs
the migration body against a table in the old shape and checks the contents
survive, which the schema drift test cannot: it compares shape, not data.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-11 21:44:05 -05:00
Evan JarrettandClaude Opus 5 e75b2e246b oauth: compare-and-swap session writes so a concurrent refresh cannot delete a live session
Refresh tokens rotate on use, and DoWithSession serializes refreshes per DID with
an in-process mutex. That is the right mechanism and it protects nothing once
there are two instances: both can refresh the same account at the same time, the
slower one presents a refresh token the auth server has already superseded, gets
invalid_grant, and isAuthError deletes the session. The user is signed out
mid-push, and the session another instance had just legitimately refreshed is
destroyed along with it.

oauth_sessions gains a rev that increments on every write. A store that has read
a session writes with a compare-and-swap against the revision it read and gets
ErrSessionRevConflict if anyone wrote first, so a stale writer can no longer
replace rotated tokens with invalidated ones. The persist callback treats that
conflict as an ordinary outcome rather than an error, since leaving the newer
state alone is exactly right.

The delete path is now guarded by the same signal. An auth error on a session
whose revision has moved since we read it means "someone else refreshed this",
not "this session is dead", so it retries once against the newer tokens instead
of deleting. Exactly once: a second failure means staleness was not the problem,
and looping would hold the per-DID lock while getting the same answer.

The guard is deliberately conservative. A store without revisions, no recorded
revision, a failed lookup, a session that is simply gone: all answer "not
advanced" and keep the previous delete-on-error behavior. Wrongly claiming a
concurrent refresh would keep a genuinely dead session alive with no way out but
waiting; wrongly missing one costs a re-login.

The sentinel lives in pkg/auth/oauth rather than next to the SQLite store,
because pkg/appview/db already imports pkg/auth/oauth and the other direction
would be an import cycle. The db package re-exports it.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-11 21:40:12 -05:00
Evan JarrettandClaude Opus 5 934e4a2a59 appview: stop the crypto key first-boot race
Two instances booting against a fresh database both find no key, both generate
one, and both write. PutCryptoKey was last-writer-wins, so the loser kept its own
key in memory while the database held the other's. It then signed OAuth client
assertions with a key absent from the published JWKS, and issued registry JWTs
that did not match the certificate written to disk. Every one of them fails
verification, and nothing logs why.

PutCryptoKey now keeps the first write, and both loaders re-read afterwards and
use whatever is stored. Nothing in the codebase rotates a key through this
function, so the update arm only ever fired on the race.

Verified against the old behavior: with last-writer-wins restored, three of six
concurrent loaders returned a key that was not the one in the database.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-11 21:34:42 -05:00
Evan JarrettandClaude Opus 5 985ebd3a5f auth: make the crew denial counter atomic
cacheDenial read denial_count, incremented it in Go, and wrote the result back.
Two overlapping denials for the same (hold, user) both read the same value and
both wrote the same value, so one increment vanished. The effect is that the
backoff ladder advances more slowly than configured, which means a denied client
keeps hammering the hold's PDS for longer than intended. Already reachable
across goroutines on one instance; routine with several behind a load balancer.

It is now a single INSERT ... ON CONFLICT DO UPDATE that increments in place.
next_retry_at moved into SQL as well, derived from the count the same statement
is producing, rather than computed in Go from a count that may already be stale
by the time the write lands. The CASE ladder is generated from
dbBackoffDurations so configuration still drives the backoff, and no request
data reaches the string.

The measured difference, with 20 concurrent denials: the old code recorded 12
where it should have recorded 21, losing 9. The new code loses none.

The surviving SELECT only picks a branch (first denial goes to memory only), so
a stale answer costs at most one skipped or one extra write, never a count.

Two implementation notes. datetime() truncates to whole seconds and the backoff
ladder is sub-second in tests, so timestamps use
strftime('%Y-%m-%dT%H:%M:%fZ', ...) instead; libSQL normalizes that to RFC 3339
and it scans back into time.Time with the right instant, which was verified
before relying on it. And a one-rung ladder emits a bare number rather than a
CASE, because "CASE ELSE x END" with no WHEN arm is a syntax error.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-11 21:33:07 -05:00
Evan JarrettandClaude Opus 5 182a5463d6 auth: stop wiping the shared denial cache on every boot
ClearAllDenials ran unconditionally at startup, and its database half is
"DELETE FROM hold_crew_denials" with no scoping at all. One instance, that is a
clean slate on deploy. Several instances, and a rolling deploy wipes the shared
table once per instance while every scale-out event wipes it again, so the
backoff that exists to stop a denied client hammering a hold's PDS keeps getting
reset out from under it.

The intent is worth keeping: a restart usually means a fix shipped, and someone
sitting on a backoff of up to an hour should get to retry rather than wait it
out. So it moves under the cleanup lease instead of being deleted, and now
happens once per deploy rather than once per instance.

Worth noting the in-memory half was always a no-op here. recentDenials belongs
to the process, and a process that has just started has an empty one, so the
table-wide DELETE was the only thing the startup call ever really did.

The cleanup worker moved down past the hold authorizer's construction, since it
now needs a handle on it. Reading s.HoldAuthorizer from the worker goroutine
while the constructor was still assigning it would have been a data race.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-11 21:32:25 -05:00
Evan JarrettandClaude Opus 5 6a7ddb819b appview: run background workers under a lease
The Jetstream consumer, backfill, labeler subscriber, cleanup sweep and billing
tier refresh all started unconditionally in every process. That is correct for
one instance and wrong for two.

The consumer is the case with teeth. StatsCache is per-process in-memory state,
and the aggregate it produces is written to repository_stats as an absolute
value rather than an increment, so two consumers each hold a partial view of the
holds and each write their partial sum as though it were the whole truth,
overwriting one another indefinitely. The webhook dispatcher hangs off the same
processor, so a second consumer also doubles every delivery.

Each now runs under a named lease, so exactly one instance runs it and a
replacement takes over when that instance goes away. The health worker is
deliberately not leased: it refreshes a cache each instance needs locally, so
running it everywhere is correct.

Two structural changes came with it. The cleanup loop moved out of
InitializeDatabase, where it was a bare goroutine with no way to reach the lease
manager, into RunPeriodicCleanup called from the server. And backfill's startup
run and periodic schedule became one leased worker instead of two goroutines on
context.Background(), so shutdown actually stops a backfill in flight rather
than letting it run on against a closing database. With interval=0 that worker
holds its lease instead of returning, since releasing would let another instance
acquire and run its own startup backfill, turning "once" into "once per
instance".

Verified with two instances against one database: exactly one acquired, the
other contended without starting a worker; SIGTERM handed over in 13ms via the
release, SIGKILL handed over in ~12s via TTL expiry.

That first number only holds because of Manager.Go and Manager.Wait, which this
commit adds. The first cut used `go m.Run(...)` and cancelled the worker context
during shutdown without waiting, so the process exited before the release landed
and the lease survived to its TTL — a rolling deploy would have paused indexing
for a minute rather than a second. Nothing in the unit tests caught it; the
two-instance run did. TestWaitBlocksUntilLeaseReleased covers it now.

leases.enabled defaults to true. A single instance is unaffected, since it
always wins its own leases, while an operator who scales out without reading the
docs still gets correct behavior instead of silent stats corruption.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-11 21:26:46 -05:00
Evan JarrettandClaude Opus 5 f84e8ffa27 db: create instance_leases and add the lease manager
Groundwork for running more than one AppView instance. Nothing is wired to this
yet; the next commit moves the background workers onto it.

Several workers must run on exactly one instance. The Jetstream consumer is the
sharpest case: StatsCache is per-process in-memory state, and the aggregate it
produces is written to repository_stats as an absolute value rather than an
increment, so two consumers would each hold a partial view of the holds and each
write its partial sum as the whole truth, overwriting one another indefinitely.
The webhook dispatcher hangs off the same processor, so a second consumer also
means every webhook fires twice.

Instances contend for a named lease; only the holder runs the worker. Acquire is
a single INSERT ... ON CONFLICT ... WHERE, so two instances racing for the same
expired lease cannot both win: the loser's update matches no rows. The fence
token increments on every change of custody, so a process that stalled past its
TTL discovers on its next renewal that it was superseded, rather than continuing
to act as the holder.

A renewal blackout is treated as a loss. If the database has been unreachable
for longer than the TTL, another instance is entitled to steal the lease and we
must assume it has, even though we cannot ask. Continuing to work in that state
is the one outcome the lease exists to prevent.

Clean shutdown expires the lease in place rather than deleting the row, so a
replacement starts in seconds instead of waiting out the TTL, while the fence
token survives to keep a stalled former holder from matching again.

Timestamps are Unix milliseconds, not TIMESTAMP text. libSQL normalizes
date-like TEXT on the way in, and Go's driver and CURRENT_TIMESTAMP disagree on
format, so a stored expiry and a literal would compare as strings that sort
differently. That comparison is the whole safety property, so it does not get to
be subtle. The cost is a dependency on roughly-synced clocks, the same
assumption Kubernetes leases make; keep the TTL well above any plausible skew.

The lease tests are file-backed rather than :memory:. go-libsql gives every
connection to an in-memory DSN its own private database, so with MaxOpenConns of
8 a second goroutine lands on a connection where the schema was never applied
("no such table"). Every existing test in the package is sequential and reuses
one pooled connection, which is why this has stayed invisible.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-11 21:17:55 -05:00
Evan JarrettandClaude Opus 5 2abcae95f7 db: warn on schema drift at startup
Migrations can be recorded without being executed. That is not hypothetical:
migration 0009 exists to clean up after 0004, which production recorded but
never applied, leaving eleven columns behind that fresh installs never had.
Nothing reported it at the time; it surfaced later as confusing behavior.

InitDB now compares an existing database against schema.sql after migrations run
and logs one warning per difference. Fresh databases skip the check, since they
were just built from schema.sql and agree by construction.

The comparison works by applying schema.sql to a throwaway in-memory database
and introspecting that, rather than parsing the DDL. SQLite's own resolution of
types, defaults and implicit indexes is exactly what we want to compare against,
and a hand-rolled parser would drift from the engine. The introspection is
shared with TestSchemaMatchesMigrations, so the test exercises the same code
that runs at boot.

Warn-only, never fatal. A database merely ahead of or behind schema.sql is
almost always still able to serve traffic, so refusing to boot would turn a diff
that wants a corrective migration into an outage, during a deploy, which is the
worst possible moment to have one.

The README claimed new tables go in schema.sql only. That is wrong in the
direction that hurts: InitDB skips schema.sql entirely once schema_migrations
has rows, so such a table appears on fresh installs, passes every test, and is
silently absent in production. Documented the real rule along with two others
the test cannot enforce: migrations must not return rows (go-libsql rejects them
with "Execute returned rows"), and rebuild migrations must name columns
explicitly, since column order legitimately differs between fresh and upgraded
databases.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-11 21:11:46 -05:00
Evan JarrettandClaude Opus 5 f5ddc229a1 db: prove schema.sql and the migrations agree
schema.sql and migrations/ are meant to move in lockstep, and nothing checked
that they did. The cost is already on the record: migration 0009 exists only
because 0004 "was supposed to drop these columns but either failed or was only
recorded (not executed) on production", leaving production carrying eleven
columns fresh installs never had.

Build the schema both ways and compare. testdata/base_schema.sql is the shape
immediately before 0009, reconstructed by reversing 0009-0029 out of the current
schema.sql; applying it and then running every migration must land on the same
place as applying schema.sql directly.

Columns compare as a set, ignoring ordinal position. Migrations append with ADD
COLUMN while schema.sql places the same column mid-table, so manifests, users,
devices and repo_pages legitimately differ in order. Reordering them would mean
four rebuild migrations for no functional gain, and nothing in pkg/appview reads
by position (no SELECT *, no column-less INSERT ... VALUES).

Verified non-vacuous three ways: a column only in schema.sql, a column only in a
migration, and a table only in schema.sql are each caught. That last case is the
one with teeth, since InitDB skips schema.sql entirely once schema_migrations has
rows, so a table added only there never reaches an existing database.

The snapshot records versions 1-8 as applied, which is what "before 0009" means.
It also sidesteps a live rake: migration 0001's query is a bare SELECT, and
go-libsql rejects row-returning statements passed to Exec. Every real database
recorded 0001 long ago so it never fires, but a future migration opening with a
SELECT would fail the same way.

This cannot independently verify tables that appear in no migration; those are
copied from schema.sql and compare against themselves. Drift there is the
startup check's job.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-11 21:08:44 -05:00
Evan JarrettandClaude Opus 5 5aa13abdc2 auth: make anonymous pull work, and let the hold decide it
a7569a7 added credential-less pulls of public images. Three things about it
were wrong, all of them in how the appview handled the decision that belongs
to the hold.

**Scope handling was all-or-nothing.** IsPullOnlyScope required every
requested action to already be "pull", but clients routinely ask for more
than the operation needs — pull,push is common for a plain read, and some
ask for pull,push,delete up front. Those were rejected and challenged,
leaving a credential-less client no way to pull even a public image, which
is the entire feature. NarrowToPullOnly drops the write actions and issues a
token carrying "pull" and nothing else. Granting a subset is what the
distribution token spec expects. The allowlist property is preserved: "pull"
is the only action that survives, and "*" is deliberately not expanded into
it, since a wildcard request is not evidence the caller wants a read.

**The appview-side read gate was inert.** checkReadAccess passed p.ctx.DID,
the DID of the repository *owner*, not the requester. Any non-empty DID
satisfies a private hold's check, and the owner's is never empty, so it asked
"may the owner read their own hold", answered yes, and admitted everyone.
Worse, CheckReadAccessWithCaptain admitted any authenticated DID to a private
hold at all, on an explicitly-MVP assumption that holding a DID was close
enough to being a sailor. Every doc says otherwise (docs/hold.md:109 "Crew
with blob:read", CLAUDE.md:140, docs/BYOS.md:280) and so does the hold
(ValidateBlobReadAccess: owner, or crew carrying blob:read/blob:write). It
now takes isCrew and requires owner-or-crew, and callers only pay for the
crew lookup when it can change the answer — a public hold or an anonymous
caller is decided by the captain record alone. Nothing here loosens access;
it brings the local gate into agreement with the authority.

**Denials could not reach the client.** distribution's blobHandler.GetBlob
maps everything except ErrBlobUnknown to ErrorCodeUnknown, so a 401 raised
in the blob store left as a 500 — misreporting an auth failure as a server
fault, and giving BearerChallenge no 401 to attach WWW-Authenticate to, so
Docker was told "server error" instead of being prompted for credentials.
Clients that retry 5xx looped: 4.1s per case in the matrix, now 0.01s. The
check moves to Repository(), where an errcode.Error is passed through
verbatim by the registry app — the same mechanism a7569a7 used for
NAME_UNKNOWN. It fails open on a lookup error, since the hold is the
authority and a transient failure should not break public pulls.

Removes auth.allow_anonymous_pull. It could only ever withhold — captain.Public
is what grants — so it was a second flag for a decision the hold already owns,
and gating it appview-side was never the intent. Layer bytes 307 straight to
S3, so the appview is not even in the path whose cost might have justified an
operator-side lever.

Tests: TestAuthMatrix only ever ran against a public hold, and its pull cases
never fetched a layer — crane.Pull is lazy and img.Digest() needs only the
manifest, which ATCR serves from the user's PDS where it is world-readable, so
no pull row in the matrix touched blob authorization at all. Pulls now
materialize layer bytes, and testharness.WithPrivateHold plus
TestAuthMatrixPrivateHold cover public:false + allow_all_crew:true — the
production shape, where anyone with an account pulls and pushes and anonymous
gets nothing.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-10 21:43:32 -05:00
Evan JarrettandClaude Opus 5 2580dcdb0f appview: stop a tag delete cascading into another repo's live image
io.atcr.manifest rkeys are the digest alone (digestToRKey), so a single
record backs every repository of a user holding identical content. Both
paths that cascade-delete that record checked for remaining tags scoped to
one repository, which asks the wrong question: a tag in another repo keeps
the shared record alive just as much as a tag in this one.

With me/a:v1 and me/b:v1 at the same digest, deleting me/a:v1 saw no
remaining tags in repo a, deleted the shared PDS record, and purged the
layers on the hold. me/b:v1 was left pointing at content that no longer
exists, and the firehose delete handler then cleared the rows for every
repo (DeleteManifest with an empty repository argument).

The collision predates this, but it was reachable only behind the opt-in
AutoRemoveUntagged profile flag. 1b91768 enabled OCI manifest DELETE and
made TagStore.Untag cascade unconditionally, which turned a latent metadata
collision into blob-level data loss on an ordinary skopeo/crane delete.

  - cleanupUntaggedManifest no longer filters candidate tags to
    rctx.Repository. The surrounding comment already noted that the tag
    collection is account-wide; the filter contradicted it.
  - ShouldCascadeDeleteManifest takes the tag question DID-wide via a new
    IsManifestTaggedAnyRepo, and drops its now-meaningless repository
    parameter.
  - IsManifestTagged stays repository-scoped and keeps its caller: the
    delete-manifest confirmation prompt is genuinely asking about the one
    repo whose tags the user is about to remove.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-10 20:22:08 -05:00
Evan JarrettandClaude Opus 5 adc6394ebc db: renumber the second 0028 migration so it actually runs
Two migration files shipped as version 28: 0028_add_device_secret_lookup
(08121f3) and 0028_create_stripe_processed_events (12c55ed).

runMigrations keys applied migrations by the integer parsed from the
filename and skips any version already present in schema_migrations, so
the first file to load records 28 and the second is skipped in silence —
no error, no log. loadMigrations enumerates via fs.Glob, which sorts
lexically, so add_device_secret_lookup won and stripe_processed_events
never ran.

On an existing database that leaves stripe_processed_events missing, and
StripeEventSeen then fails closed: the error wraps into ErrWebhookProcessing,
the webhook returns 500, and Stripe redelivers into the same missing table
forever. No subscription, tier, or dispute event is ever applied — defeating
the exact idempotency 12c55ed was written to add.

Fresh installs were unaffected, which is why no test caught it: they take
the applySchema path where schema.sql already has the table and both
version-28 rows are merely recorded as applied.

Renumbered to 0029 rather than renumbering the device migration, so a
database that already ran this build (28 recorded, devices.secret_lookup
present, stripe table missing) picks the migration up on next boot instead
of staying broken. Renumbering the other file would have left that database
with the table still missing and re-run its ALTER on a column that exists.

Adds two guards: one asserting migration versions are distinct, and one
exercising the upgrade path where a duplicate manifests as a missing
schema_migrations row. Both fail on a planted duplicate.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-10 20:21:56 -05:00
Evan JarrettandClaude Opus 5 a7569a7717 registry: allow anonymous pull of public images
Credential-less pulls of public images. /auth/token issues a pull-only
token with an empty subject when no Basic auth is present; the
destination hold still enforces captain.Public, and push or delete always
challenges.

  - token.IsPullOnlyScope and AuthMethodAnonymous;
    Handler.issueAnonymousToken skips the authorizer gate and the
    service-auth pre-mint, since there is no identity to reconcile and no
    AppView-to-hold service token to bind. The token is still stamped
    with the resolved registry domain, so anonymous pull works on
    secondary front doors whose access controller demands their own
    audience.
  - auth.allow_anonymous_pull (default true) turns it fully off, restoring
    the previous always-challenge behavior. Mirrored into the deploy
    template, since the default means existing deploys pick this up.
  - RegistryContext.Anonymous is plumbed from the middleware.
  - ProxyBlobStore sends no Authorization header when the service token is
    empty, and returns 401 rather than 403 for anonymous denials so Docker
    prompts for credentials, including when a stale captain cache lets the
    request through and the hold says private.
  - BearerChallenge wraps the /v2/ subtree so a 401 raised deep in the
    stack via errcode.ServeJSON still carries WWW-Authenticate.
    Distribution's own scoped challenges are left alone.

IsPullOnlyScope allowlists the pull action instead of denylisting push and
delete. Distribution's actionSet.contains treats "*" as *every* action, so
a scope of `repository:victim/img:*` names neither denied string and would
have handed an unauthenticated caller a token valid for push and delete on
someone else's repository — clearing the authgate entirely, since anonymous
tokens deliberately skip it. Writes would still have failed further down
(no PDS credential), but the gate itself was bypassable. Now every
requested action must be exactly "pull". Covered by new claims tests.

Unresolvable identities return NAME_UNKNOWN instead of a bare error that
distribution renders as 500. This path was previously unreachable without
credentials; anonymous pull opens it to the internet, and a 5xx on
arbitrary input both misreports a bad request as a server fault and sends
clients that retry 5xx into a retry loop. That loop was real: in the auth
matrix, regclient spent 83s on a single case before this fix, and the
suite now runs in 5s.

Stat preserves an authorization verdict from getPresignedURL rather than
flattening it to ErrBlobUnknown. Distribution calls Stat before ServeBlob
on GET and HEAD, so without this an anonymous pull from a private hold
answered 404 and BearerChallenge had no 401 to annotate — the 401 path
above could never actually reach a client.

The auth matrix is updated to match: anonymous pull of the seeded public
repo now succeeds, anonymous push is denied against a real identity's
namespace (rather than an unresolvable one, which was testing name
resolution rather than authorization), and a new case pins the
NAME_UNKNOWN behavior for an unknown identity.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-09 21:14:58 -05:00
Evan JarrettandClaude Opus 5 6510c16dd4 webhooks: enforce the entitlement at dispatch time
The webhook limit was only checked at creation, so losing entitlement (a
hold switch or a plan downgrade) left previously-created webhooks firing
paid behavior forever.

  - Dispatcher takes a WebhookLimiter, consulted on every dispatch. It
    caps the list to the current allowance, keeping the oldest N to match
    what the creation gate would have permitted, and masks paid trigger
    bits.
  - GetWebhooksForUser orders by created_at ASC, id ASC so that cap is
    deterministic. ListWebhooks gets the same tiebreak: it feeds the
    settings UI, and without it the list a user sees could disagree with
    the one the dispatcher truncates.
  - webhooks.FreeTriggerMask is shared by the creation gate and the
    dispatch backstop so the two cannot drift.

Capping is logged when it actually truncates. The webhooks stay visible in
settings, so from the user's side delivery would otherwise just stop with
no signal — and the same line is the only evidence if the limiter itself
degraded, since a billing lookup failure falls back to free-tier limits
and would quietly demote a paying user mid-dispatch.

Two cost fixes, both because this puts the entitlement lookup on a hot
path it was never on before:

findCustomerByDID now consults the customer cache instead of always
issuing a Stripe customer search. GetWebhookLimits reaches it via
GetSubscriptionInfo on every delivery, so uncached it meant a
rate-limited Search API call for every push and every scan record of
every user with a webhook configured.

DispatchForQuota checks whether the user has any quota webhook at all
before fetching the allowance. The original code filtered first precisely
so the common path (no quota webhooks) did no work; taking the allowance
up front would have spent the expensive lookup on every push. The cap
itself is still computed over the full list, since the count limit spans
all webhook types.

Note DeliverTest is deliberately not capped: it is an explicit,
user-initiated "send test" from the settings page, not automatic delivery.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-09 21:14:58 -05:00
Evan JarrettandClaude Opus 5 2b71be59f7 billing: require a managed hold for paid features
Entitlements were keyed on the Stripe subscription alone, so a subscriber
who switched to a self-hosted hold kept paying for features the appview
cannot deliver, and could still reach checkout.

  - billing.ActiveHoldChecker and Manager.onManagedHold gate every
    entitlement. An empty default hold counts as managed: the user has no
    explicit preference and falls back to the operator's primary managed
    hold.
  - The checker reads the primary DB, not the read replica. A hold switch
    writes default_hold_did to the primary, and replica lag would keep
    paid features alive after a switch away.
  - db.GetUserDefaultHoldDID is the clean default-hold signal, unlike
    GetUserHoldDID which falls back to a manifest hold_endpoint (a URL,
    not a DID).
  - Jetstream fails closed: an unresolvable hold reference is cached raw
    rather than left empty, since an empty value reads as managed.
  - UI: the billing tab is hidden on self-hosted, a cancel/manage banner
    appears when a self-hosted user still has an active plan, the image
    advisor returns managed_hold_required instead of upgrade_required,
    and the checkout route returns 403. The portal stays open so existing
    subscribers can still cancel.

Two consistency fixes fall out of wiring this up:

The settings UI reads the resolved default_hold_did rather than the raw
profile.DefaultHold. The profile field is the record value as written and
may be a URL-form reference; jetstream resolves it to a DID on the way
into the DB, and the server-side gate reads that resolved value. Comparing
the raw form against managed DIDs would show the "you are self-hosted"
banner and hide billing from a user whose entitlements say otherwise.

HasAIAdvisor falls back to the free tier's AIAdvisor setting when
off-managed instead of a hard false, matching GetWebhookLimits. Losing a
managed hold should drop a user to free-tier entitlements, not below them.

BEHAVIOR CHANGE for existing paying users on self-hosted holds: they lose
the AI advisor, supporter badge and paid webhook limits as soon as this
deploys, while Stripe keeps charging them. The only notice is the banner
on /settings/storage, which they have to visit to see. Decide on a
migration (notification, or a one-time reconciliation over active
subscriptions) before shipping this.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-09 21:14:58 -05:00
Evan JarrettandClaude Opus 5 12c55ed560 billing: make Stripe webhook delivery idempotent and retryable
Webhook delivery was neither idempotent nor order-safe, and every failure
returned 400, which Stripe does not retry. A transient DB or hold error
therefore dropped a subscription change silently and permanently.

  - New stripe_processed_events table: event_id as primary key dedups
    redelivery, and event_created per customer drops stale out-of-order
    deliveries.
  - HandleWebhook distinguishes ErrWebhookSignature (400, no retry) from
    ErrWebhookProcessing (500, Stripe redelivers). The event handlers
    return errors instead of swallowing them. ErrBillingDisabled maps to
    400: the route is mounted but billing is off, so redelivery can never
    succeed and Stripe should stop rather than retry to exhaustion.
  - Refuse to boot when billing is enabled with an empty
    STRIPE_WEBHOOK_SECRET. Stripe HMACs with the empty key, so an
    attacker can reproduce the signature and the endpoint is forgeable.
  - UpdateCrewTierOnAllHolds retries each hold (3 attempts, linear
    backoff, 5s per request) and returns a joined error so the webhook
    can fail and let Stripe redeliver.

The fan-out contacts holds concurrently rather than in sequence. Serially,
one unreachable hold burns the caller's entire 10s budget on its own
retries (3 x 5s plus backoff) and the holds after it are never contacted;
because Stripe redelivers in the same order, a persistently-down first
hold means the rest are never updated at all.

On the hold, the signature-validated sub claim is now the source of truth
for updateCrewTier: a mismatched body userDid is rejected with 403 rather
than retargeting the grant to another DID. "Not crew on this hold" is a
200 no-op, since the appview fans updates out to every managed hold and a
subscriber is not crew everywhere.

That no-op has to be told apart from a storage failure. GetCrewMember
collapsed both into one generic error, so a CAR-store failure read as
"not a member", answered 200, and let the appview record the event as
processed — losing the tier grant permanently, which is exactly the
failure mode this commit exists to prevent. Missing records now carry an
ErrCrewMemberNotFound sentinel, and anything else returns 500 so Stripe
redelivers.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-09 21:14:58 -05:00
Evan JarrettandClaude Opus 5 1b917686b2 appview: support OCI manifest DELETE
DELETE /v2/<name>/manifests/<ref> answered UNSUPPORTED before ever
reaching the ATProto-backed stores: distribution v3.1.1's DeleteManifest
handler short-circuits unless app.deleteEnabled is set, which comes from
storage.delete.enabled. Set it (mirrored in the test harness). The
companion storage.EnableDelete option it appends only affects
distribution's built-in store, which RoutingRepository replaces, so it is
a no-op for us.

With the route reachable, make the stores do the right thing:

  - ManifestStore.Delete purges the hold's per-layer, scan and image
    config records on a detached context, since the DELETE handler
    returns immediately and cancels the request context.
  - TagStore.Untag resolves the digest before deleting the tag record,
    then deletes the manifest if that was its last tag and it is not a
    manifest list child, matching the web UI's delete-tag behavior so
    deleting an only-tagged image doesn't orphan the manifest.
  - cleanupUntaggedManifest becomes package-level over *RegistryContext
    so both stores share one implementation.
  - purgeOnHold moves out of handlers into pkg/appview/holdpurge so the
    storage layer can call it: handlers already depends on storage via
    middleware, so storage to handlers would be an import cycle.
  - ProxyBlobStore.Delete returns distribution.ErrUnsupported, so the
    always-registered blob DELETE route gives a clean OCI UNSUPPORTED
    error instead of a generic 500. Layer bytes are reclaimed by the
    hold's refcounted GC.

The cascade's still-tagged re-check pages through the tag records rather
than reading a single capped page. Tags for all of a user's repositories
share one collection, so one page is a per-account budget: past ~100 tags
a live tag fell off the end and the manifest was deleted while still
referenced. Incomplete enumeration now skips the delete, since an
orphaned manifest is recoverable and a deleted live one is not.

This also makes the over-quota delete grant added in 6e426dc load-bearing:
it hands out pull,delete tokens, which could not do anything while
distribution rejected every DELETE.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-09 20:54:50 -05:00
Evan JarrettandClaude Opus 5 9d4ad84a3e auth: surface read-only app passwords as 403, not 503
A read-only app password authenticates fine via createSession but cannot
call com.atproto.server.getServiceAuth, which is privileged — the PDS
answers 403 InsufficientScope. That fell through to the generic non-200
path and became a 503, which invites the client to retry a request that
can never succeed, with no indication of what is actually wrong.

Classify it with a sentinel error and map it to a 403 at /auth/token,
carrying text that names the fix: use a full-access app password.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-09 20:52:59 -05:00
Evan JarrettandClaude Opus 5 e6959e6dc6 auth: bound the PDS and hold HTTP clients on the token path
createSession, the app-password getServiceAuth call, and the hold's
/.well-known/atproto-did resolution all used http.DefaultClient, which
has no timeout. All three run on the /auth/token path, so a slow or
unreachable PDS or hold could hold the request open indefinitely, well
past Docker's own token-fetch timeout.

Give each a bounded client: 15s for createSession, 10s for the
app-password getServiceAuth, 10s for the hold DID fetch. All three are
safe to cut off — the two GETs are idempotent, and a timed-out
createSession only orphans an unused server-side session.

The OAuth refresh path deliberately keeps no overall timeout: its POSTs
run through refreshDetachTransport and must not be cancelled mid-rotation,
which would strand a rotated refresh token.

Note holdDIDResolveClient is package-level in pkg/atproto, so the 10s cap
applies to every ResolveHoldDID caller, including the GC, Jetstream
backfill and hold-health background workers, not only the token path.
That is intended (none of them want an unbounded fetch either), but it is
a wider blast radius than the token path alone.

This bounds three hops, not the whole request: the OAuth getServiceAuth
GET and identity resolution are still unbounded, so /auth/token is not
yet fully time-boxed.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-09 20:52:13 -05:00
Evan JarrettandClaude Opus 5 cecb8879de billing: escape the DID before interpolating it into a Stripe search
findCustomerByDID built its search query with fmt.Sprintf, so the DID was
interpolated into a quoted Stripe search string unescaped. DIDs arriving
here are OAuth-validated and the DID grammar forbids quotes, so this is
not currently exploitable, but the query's safety depended on a validator
several layers away rather than on anything visible at the call site.

Escape backslash and single quote the way Stripe's search grammar
specifies.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-09 20:51:31 -05:00
Evan JarrettandClaude Opus 5 fa34da0f26 appview: point the footer Bluesky link at the DID
Handles can change; the DID cannot. Linking the DID keeps the footer
correct if the account's handle is ever reassigned.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-09 20:49:24 -05:00
Evan JarrettandClaude Opus 5 7d9de7c090 admin: resolve handles after limiting top users
The dashboard's top-users panel resolved a handle for every user with a
quota record, then sorted and truncated to ten. On a hold with ~500 crew
that is ~500 serial identity lookups to render ten rows.

Each lookup goes through the shared identity directory, whose HTTP client
allows 10s per request. One stalled lookup consumed the entire reverse
proxy budget, so the panel returned a partial body and the client hung up
mid-render:

  admin/auth.go:161 "Failed to render template"
    template=partials/top_users.html
    error="write: broken pipe"
  "GET /admin/api/top-users?limit=10" - 200 4096B in 10.005s

Sort and truncate first, then resolve only the surviving rows, so the
count is bounded by the limit rather than by hold size. Resolve those
concurrently under a 3s deadline: a slow lookup now degrades to a bare
DID instead of taking the whole request down with it.

The crew tab has the same underlying problem in a different shape, one
lazy-load request per row, and is not addressed here.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-09 20:22:46 -05:00
Evan JarrettandClaude Opus 5 6e426dc695 auth: let over-quota users delete by granting the non-push subset
The quota gate ran on any scope containing "push" and denied the entire
token request, so "quota exceeded ... Delete images to free space" named
a remedy the gate itself blocked: docker and crane both request
pull,push,delete for a manifest delete, and manifest DELETE is
bearer-only, so there was no path left to free space.

When the request also asks for delete, drop push from the repository
entries and issue the reduced token instead of denying. A plain
pull,push is still denied so the quota message reaches the client that
needs to see it; granting a pushless token there would turn a clear
error into an opaque 401 on the first blob upload.

The narrowing happens in place on the access slice the handler hands to
the issuer, so document that on token.Authorizer along with the ordering
the gate goroutine depends on.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-09 16:49:44 -05:00
Evan JarrettandClaude Opus 5 c035f50f69 appview: delete tag records with the encoded rkey on manifest delete
DeleteManifestHandler built the tag rkey as "repo:tag" while the write
path uses RepositoryTagToRKey, which is "repo_tag" with "/" encoded as
"~". For a nested repo like stream/cache the two never match, so the
cascade leaves the tag record on the PDS while removing the local cache
row, and the tag reappears on the next backfill. Depending on the
variant it either no-ops (deleteRecord is idempotent) or fails outright
on an rkey containing a slash.

Every other io.atcr.tag call site already routes through the helper.
This was the last hand-built one.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-09 16:49:39 -05:00
Evan JarrettandClaude Opus 5 95d4f7c31b hold/gc: stop an unreachable predecessor hold from losing its blobs
checkPredecessor returned a bare false on every failure path (DNS failure,
dial error, non-200, 5s timeout, unparseable body), indistinguishable from a
hold affirmatively answering "I have no successor". isPredecessorHold then
cached that false in predecessorCache, which lives for the life of the
process and is never reset, so one blip during a single GC run permanently
unreferenced that hold's manifests. Those blobs are long past the 7-day
grace period that protects recent content, so the next run deleted them
outright with nothing to fall back on.

checkPredecessor now reports whether its answer is definitive, and only
definitive answers are cached. An inconclusive check keeps the hold's
manifests referenced and is recorded in predecessorUnresolved, which bounds
the cost to one timeout per run rather than one per manifest and is cleared
at the start of every analysis so a hold that was down once is re-checked
next time instead of written off.

This matches the convention the rest of the package already follows: a user
whose PDS cannot be reached has their records treated as referenced, never
as garbage. An outage must not be the reason content becomes deletable.

Non-200 counts as inconclusive on the same reasoning. A reachable service
that cannot produce its own captain record is malfunctioning, not answering,
and over-protecting an unrelated hold merely leaves some blobs unreclaimed.

Splits the fetch-and-parse half into checkPredecessorAt so it can be tested
against a local server without depending on DNS.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-09 16:07:16 -05:00
Evan JarrettandClaude Opus 5 e6d3a122f6 auth: evict app-password tokens a PDS reports stale, not just on 401
An expired app-password token could wedge an account permanently. The 401
branch clears the cached token, but some PDSes report the same condition as
400 with an atproto error name in the body, which fell through to the generic
non-200 branch. That clears only the derived service token, so the dead
bearer token stayed in the cache and every subsequent request replayed it.

Observed on one account against at.hexlab.foo: 16,110 of these errors and
4,254 retryable 503s over 33 hours, with no recovery path. The cache is
in-memory, so it only cleared on process restart.

Now the non-200 branch classifies the atproto error name and evicts on the
ones that mean the presented token is unusable, matching what the 401 branch
already does. For app-passwords that is the equivalent of a refresh: the next
authentication re-mints via createSession.

Deliberately not routed through oauth.IsSessionInvalidError, which excludes
ExpiredToken on purpose — there it would delete a recoverable OAuth session
and sign the user out everywhere, whereas here the only thing discarded is a
cache entry that will be repopulated.

Not addressed here: the failure still surfaces as a 503, which is retryable
and so keeps clients looping. Returning 401 with the re-auth hint would be
the better signal, but it spans the token handler and is a separate change.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-08 23:27:49 -05:00
Evan JarrettandClaude Opus 5 08121f3cd0 appview: fix O(n) bcrypt scan making /auth/token take 15s+
ValidateDeviceSecret ran bcrypt.CompareHashAndPassword against every row in
the devices table until one matched — no WHERE clause. At bcrypt cost 10
(~65ms on the single-core production host) and 244 registered devices, a
device near the end of the scan cost ~15.8s of pure CPU per /auth/token,
which is past Docker's client deadline. Measured on production: 15.7-16.0s
steady state with the appview pinned at 100% CPU for the duration, while
anonymous requests on the same box served in 20ms.

The cost grew linearly with every device registered, and the scan ran in
rowid order, so the newest devices — the ones most likely to be in active
use — paid the most. This is the timeout users were reporting.

Devices now carry secret_lookup = hex(sha256(secret)), indexed, and
authentication fetches the single matching row.

SHA-256 is the verifier here, not merely an index. Device secrets are 32
bytes from crypto/rand, so presenting a value that hashes to a stored digest
requires a preimage or a 2^256 search. bcrypt's work factor only helps when
the input space is small enough to enumerate, which does not apply to a
random 256-bit token, and a database leak exposes no more than before.

The plaintext is not recoverable from a bcrypt hash, so existing rows cannot
be backfilled directly. They are migrated lazily on their next successful
authentication, which any push, pull or login triggers, and the legacy scan
is filtered to un-migrated rows so its cost decays as devices migrate. The
backfill runs after the cursor is closed: issuing it inside the rows loop
deadlocks, because the open cursor holds the connection the write needs.

bcrypt now exists solely to carry legacy rows across and can be deleted once
the table is fully migrated.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-08 23:01:07 -05:00
Evan JarrettandClaude Opus 5 b25aee336b auth: serve the OAuth2 POST form at /auth/token
The route was registered GET-only, so containerd and Docker, which try the
OAuth2 POST endpoint first whenever they hold a secret, ate a 405 and retried
on the GET form. Every authenticated pull paid two auth round trips, and in the
production logs the POST share of token traffic grew from 0.5% to 38% over six
weeks as more clients pulled from k8s with basic-auth imagePullSecrets.

Serve both specs on the same path. After credentials and scope are extracted
the two paths are identical, so this is an extraction branch plus a form-shaped
error writer.

Only grant_type=password is supported and no refresh token is issued: the
registry JWT's lifetime is pinned to the AppView<->hold service-auth, so a
refresh token would be a fourth long-lived credential with its own storage and
revocation. Clients handle its absence by continuing to use the credential they
already hold.

The refresh grant is refused with 401 rather than the 400 that RFC 6749 5.2
prescribes. containerd sends that grant only when it has no username, which is
the same condition that disables its 405 fallback, so a 400 would hard-fail
those clients. 401 is on its retry list and routes them to the GET form, where
a device secret authenticates off the password alone. That shape previously had
no working path at all.

resolveService now takes the requested service as an argument, since it arrives
in the query string on GET and in the form body on POST.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-08 22:19:10 -05:00
Evan JarrettandClaude Opus 5 05b856bf4e hold/pds: fix two scanner-disconnect panics in the scan broadcaster
Same class of bug as the firehose backfill, plus a second one found alongside
it. Both take down the whole hold process.

1. send on closed channel. Subscribe spawns drainPendingJobs in its own
   goroutine, and it sends to sub.send without holding sb.mu. Unsubscribe
   closed sub.send under the lock, so a scanner disconnecting during the drain
   closed the channel out from under an in-flight send. The existing
   `case <-sub.done` guard did not help: done meant "writer goroutine exited"
   and was closed by handleWriter, which is a different event from
   unsubscribing.

2. close of closed channel. Unsubscribe closed sub.send unconditionally, but
   it is called from two places — handleWriter on write error, and
   handleReader in its defer. A scanner dropping mid-write hits both, and the
   slice-removal loop had no guard, so the second call fell straight through
   to the close. The unassign UPDATE ran twice for the same reason, which
   could return jobs a replacement scanner had already been handed.

sub.send is now never closed. done is repurposed to mean "this subscriber is
gone", closed only by Unsubscribe and guarded on whether the subscriber was
actually still registered. That makes drainPendingJobs' existing done case
correct, and handleWriter selects on done rather than ranging over send.

dispatchJob was already safe — it sends under sb.mu, which excludes
Unsubscribe.

hold01 is unaffected in practice (scanner disabled, no shared secret), but
seamark-hold runs the scanner continuously and is exposed on any scanner
restart.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-08 21:37:40 -05:00
Evan JarrettandClaude Opus 5 ca539b1f9d hold/pds: stop firehose backfill panicking on subscriber disconnect
A relay that connected with a stale cursor and then dropped mid-backfill took
the whole hold process down:

    panic: send on closed channel
      pds.sendBackfillMsg          events.go:869
      pds.backfillFromDatabase     events.go:809
      pds.backfillSubscriber       events.go:716

Subscribe spawns backfillSubscriber in its own goroutine, and that goroutine
writes to sub.send without holding b.mu. Unsubscribe closed sub.send under the
lock, so a disconnect during backfill closed the channel out from under an
in-flight send. select cannot guard that — a send on a closed channel panics
unconditionally.

sub.send is now never closed. Subscriber gains a done channel that Unsubscribe
closes instead, and every sender that runs unlocked selects on it. The map
check in Unsubscribe keeps the close single-shot, which matters because both
readPump and handleSubscriber call it on the way out. handleSubscriber selects
on done rather than ranging over send, since nothing closes send any more.

Broadcast and BroadcastIdentity were already safe (they send under b.mu, which
excludes Unsubscribe). backfillFromMemory was safe too via b.mu.RLock, but now
routes through the shared helper so a disconnect aborts immediately instead of
stalling up to 5s per event while holding the read lock and blocking every
broadcast.

The bug dates to 2025-10, so every build since is affected. It only fires when
a backfill goroutine exists, which Subscribe skips when cursor == currentSeq —
that is why caught-up relays never triggered it and a hold whose relays are all
behind is exposed on every reconnect.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-08 21:33:29 -05:00
Evan JarrettandClaude Opus 5 017755c6d4 hold/gc: stop the aux-record sweep deleting live records
Follow-up to f12d5e0. Extending the orphan sweep to io.atcr.hold.scan and
io.atcr.hold.image.config brought those collections under a delete path built
for layer records, and the two are not interchangeable. Layer rkeys are
generated per write, so a remembered rkey is a stable handle on one record.
Scan and image-config rkeys are atproto.ScanRecordKey(manifestDigest) — the bare
digest hex, with no DID — which is both reused across re-pushes and shared
between users who push identical images. "Delete rkey K" therefore stopped
meaning "delete the record I judged", and the sweep could destroy live data two
ways.

Both were confirmed by probe before being fixed, and each guard below has a
regression test that fails when that guard alone is reverted.

Shared records: two users pushing the same image collapse onto ONE record whose
body names only the last writer. When that user deleted their manifest the
record looked orphaned, and deleting it stripped the vulnerability scan and the
layer history/env/entrypoint from every co-owner's still-live image.

  - knownDigests keeps a record while any successfully fetched user still holds
    a manifest at that digest, not just the one the record names.

  - knownDigests alone is not enough: it is built only from users we reached, so
    a co-owner whose PDS was down this run is indistinguishable from one who
    deleted their image. digestOwners closes that. It maps each digest to every
    DID that pushed it here, derived from the hold's own layer records during
    the walk analyzeRecords already performs, so it costs nothing extra and
    needs no network. If any owner was unreachable, the record stays. This is
    the sweep's existing principle — an unreachable PDS never causes a deletion —
    extended from the record's named user to everyone the record serves.

    Layer records are the right source because they are load-bearing for storage
    accounting and billing, so they exist for anything a user is charged for.

Reused rkeys: a re-push upserts into the same digest-derived slot, so a record
marked orphaned by an earlier scan can be replaced by a LIVE one before the
delete runs. The admin delete button makes this wide — lastPreview is in-memory
for the life of the process, so an open tab keeps a stale scan actionable — and
doRun has the same race across its analyze-to-delete gap.

  - Records now carry the CID they had when judged, and the delete re-reads the
    slot to confirm it still holds that revision. Anything else (rewritten,
    missing, unreadable, or a ref with no recorded CID) is skipped, not deleted.

  - The CID check is record identity, not orphanhood, and identity alone is not
    enough either. A re-push does not necessarily rewrite the SCAN record:
    scan-on-push is tier-gated, and the broadcaster's discovery loop skips any
    manifest that already has a scan record, so its CID survives a re-push
    unchanged. manifestsWithLayerRecords covers that — a push writes layer
    records to this hold, so their presence proves the manifest is back
    regardless of what the scan concluded. Local, no PDS round trip. A manifest
    whose layer records are themselves orphaned but not yet collected also lands
    in the set, which only defers its aux record one cycle; one more round of a
    leak beats deleting a live user's records.

  - maxPreviewAgeForDelete (30m) refuses a stale preview outright. The
    per-record checks are the real safety net; this stops the admin acting on a
    picture that is hours old. Refusal surfaces through startBackground ->
    lastError -> the polling progress fragment, so it is visible rather than a
    silent no-op.

The four state maps auxRecordOrphaned consults are grouped into auxOrphanState.
Three are same-shaped maps that were trivial to transpose positionally, and
swapping knownDigests with fetchedUsers would have silently widened what the
sweep deletes.

Not addressed, all failure-to-collect rather than data loss: maxPreviewItems
caps the admin button's list while doRun uses the uncapped one, so a hold with
10000+ orphaned layer records surfaces no aux orphans in the preview;
DeleteManifestAuxRecord cannot distinguish "already gone" from "write failed";
and discoverUserDIDs never consults the aux collections, so a record whose owner
has no remaining layer records is kept indefinitely.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-08 21:24:00 -05:00
Evan JarrettandClaude Opus 4.8 3f21cc98b8 hold/gc: sweep orphaned scan and image config records
A user who deletes a manifest record directly on their PDS was invisible
to the hold. purgeManifest only fires on appview-driven deletes, and the
GC orphan sweep only walked io.atcr.hold.layer, so scan and image config
records survived forever and the user's storage number never dropped.

analyzeRecords now also walks io.atcr.hold.scan and
io.atcr.hold.image.config, applying the same orphan test the layer sweep
uses: a record dies only when its owning PDS was reachable and
demonstrably lacks the manifest. Unreachable PDS, unparseable URI,
unparseable timestamp, and immature records all keep.

Splitting the grace period was required to make this useful, not
cosmetic. Records only need to outlast a push (blobs and layer records
are written before the manifest reaches the user's PDS), so they age out
at 24h. Blobs stay on the 7 day window, but since records now age out
faster than the blobs they name, a record can no longer serve as its
blob's clock. Blob age comes from S3 LastModified instead, which
WalkBlobs already received from ListObjectsV2 and was discarding.

Net effect: pruning an old manifest frees the user's storage on the next
nightly run rather than never, while the bytes are still reclaimed on
the same best-effort schedule as before.

DeleteManifestAuxRecord is deliberately narrow, accepting only the scan
and image config collections, so a bug in the sweep can't reach captain,
crew, or layer records.

Not addressed: the SBOM and vuln report blobs those scan records point
at. They share the /repos/{holdDID}/blobs/ prefix with the hold's avatar
and OG images, so collecting them needs a referenced-CID set built from
the hold's own records rather than a prefix walk.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-08-08 21:24:00 -05:00
Evan JarrettandClaude Opus 5 2719428071 appview: give each registry domain its own JWT service name
An AppView can front several registry domains that all reach the same
backend (seamark.dev serving buoy.cr, seamark.cr, and soon atcr.io).
Distribution's token access controller holds `service` as a single string
and uses it twice: as the value advertised in the WWW-Authenticate
challenge, and as the sole accepted JWT audience. So it announced one
domain's name on every domain, and honoured one domain's tokens
everywhere. A push to seamark.cr was challenged with service="buoy.cr".

Both uses sit inside Authorized, which already has the request, but the
value is fixed at construction and reachable through no hook — autoredirect
only templates the realm. So register an "atcr-token" controller that
builds one upstream controller per domain and dispatches on r.Host. Each
front door now advertises its own name and demands its own audience. All
signature, certificate and claim verification stays in upstream code; this
only routes.

The token handler stops discarding ?service= and stamps the audience with
the front door the client used, allowlist-checked against the configured
domains so the value stays server-determined despite arriving from the
client. It has to come from the query param because the realm lives on the
UI host, where r.Host names no registry domain.

This is token hygiene and spec conformance, not a privilege boundary: every
domain fronts the same backend, so a client can obtain a token for any of
them just by handshaking there. What it buys is a truthful challenge and
the decoupling needed to later split a domain onto its own AppView.

Also unify the domain list. DomainRoutingMiddleware keyed its map on the
raw config while matching a port-stripped host, so a domain configured with
a port could never match its own requests. It now shares the normalized
cfg.Auth.Services, so routing and authorization agree on one set of names.
cfg.Auth.ServiceName was an exact alias for Services[0] and is replaced by
PrimaryService(), which also removes an empty-slice index.

Rollout: the audience for seamark.cr and bouy.cr changes, so a token minted
just before the restart draws one 401 and Docker re-handshakes into a valid
one. buoy.cr is unchanged (it stays primary), and atcr.io keeps the service
name it already has today. The challenge and the accepted audience come
from the same delegate, so the retry converges by construction. Deploy as a
single flip, not a canary: an old instance ignores ?service= and would keep
minting the primary audience while a new one rejects it.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-02 20:40:55 -05:00
Evan JarrettandClaude Opus 5 3298797603 appview: resolve managed hold names off the privacy render path
Follow-up to 6e77311. Listing the operated holds on /privacy put
resolveHoldDisplayName in the render path, where it makes up to two sequential
network calls per DID: the DID document fetch, then handle verification. /privacy
is public and unauthenticated, and the server sets no HTTP read or write timeout,
so an unreachable hold or a plc.directory outage stalled the page for every
visitor. The identity directory's negative-cache TTL is short, so the stall
recurred rather than settling after the first hit.

The DIDs come from config and never change while the process runs, so resolution
happens once in a background goroutine and lands in an atomic.Pointer. The
handler is constructed once at route registration, so the cache is process-wide.
Until resolution completes the page renders offline names, which are already
correct for did:web holds since those decode straight from the DID.

Dropped the did:plc truncation. resolveHoldDisplayName's last fallback cut a DID
to 24 characters plus an ellipsis, which is shorter than a did:plc, so the result
could not be resolved back to a hold. That is tolerable in a settings dropdown
and actively misleading in a privacy policy naming the services we operate.
Shortening for display belongs in the template. The non-network fallbacks are now
in holdDisplayNameOffline so the background resolver and the render path share
them.

Also fixed the surrounding copy, which scoped coverage to *.<site> domains while
the list immediately above it could contain holds on other domains — the two
sentences contradicted each other. It now refers to the listed holds, and only
makes that claim when there is a real list; with no managed holds configured the
template still shows an illustrative placeholder, which must not be presented as
fact in a legal document.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-02 19:20:11 -05:00
Evan JarrettandClaude Opus 5 500ee2f8d1 auth: classify service-token failures structurally, not by string
Follow-up to 37bab32. That commit stopped deleting OAuth sessions on transient
errors, which fixed spurious sign-outs but overshot on one path: a genuinely dead
session stopped being evicted at all, turning a forced re-login into a permanent
failure loop.

GetOrFetchServiceToken flattened every non-200 from getServiceAuth into
fmt.Errorf("service auth failed with status %d: %s"). IsSessionInvalidError then
had nothing structured to inspect, and its string fallback could not help: it
looks for the OAuth 2.0 code invalid_token, while atproto emits the XRPC name
InvalidToken. The difference is the underscore, not the case, so lowercasing
never bridged it. A revoked session came back 401 InvalidToken and was classified
transient, so /auth/token returned 503 forever and the user was never prompted to
re-authenticate.

The non-200 branch now wraps an *atclient.APIError carrying the status and the
parsed atproto error name, which is what the existing structured checks in
IsSessionInvalidError already know how to read. Transient shapes stay transient:
atprotoErrorName returns "" for a non-JSON body, so 500s with HTML, 502s, and
429s do not evict.

ExpiredToken is deliberately not treated as a dead session. It means "refresh
me", and deleting on it would sign the user out of every UI session over an
ordinary access-token expiry a refresh would have fixed. isAuthError omits it for
the same reason; the two classifiers have to agree about the same condition.

The comment on the string fallback claimed it was a looser spelling of the
structured check. It is not — it handles a different error family. indigo's
RefreshTokens returns OAuth token-endpoint failures as a bare fmt.Errorf carrying
the auth server's snake_case code verbatim ("token refresh failed (HTTP 400):
invalid_grant"), never a typed error, so a string match is the only thing that
can classify a refresh failure, which is the invalid_grant replay case 37bab32
exists to detect. Both comments now say which family they cover.

Two hardening items on the same theme:

use_dpop_nonce no longer counts as an auth error in the appview's isOAuthError.
It is a routine handshake step indigo retries with the server-supplied nonce, and
treating it as fatal signed users out over ordinary nonce rotation. It can still
escape when a server sends that error with no DPoP-Nonce header, leaving indigo
nothing to retry with; a stuck session there is preferable to signing everyone
out in the common case, and the comment says so rather than claiming it cannot
happen.

Detached session deletes are bounded by SessionDeleteTimeout. They run on
context.WithoutCancel so a canceled request cannot leave the cleanup half-done,
which also stripped the only deadline they had — a wedged database write blocked
the goroutine with no way to shed it. Matches the bound already on the detached
persist callback. The unparseable-token-endpoint warning is now deduped per
endpoint rather than once per process, since that path fails open by returning
the client unwrapped, silently reinstating the refresh burn.

The refreshDetachTimeout comment now notes the cap is per-POST: the DPoP-nonce
retry means one refresh can issue two, holding the per-DID lock for up to twice
the stated value.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-02 19:19:59 -05:00
Evan JarrettandClaude Opus 5 c615d7253b credhelper: make config writes non-destructive
Follow-up to 8a556a5. v3 keys accounts by DID and, unlike v2, rewrites the
config during ordinary `docker pull` traffic (migration on first read, DID
backfill after a successful get) rather than only on explicit login. That moved
three latent ways to lose a device.json onto the hot path. A user cannot recover
from any of them: once the file is gone they no longer know which accounts they
had.

save() is now atomic. It writes a temp file in the same directory, fsyncs, and
renames, so the config always holds either the previous contents or the complete
new contents. The truncate-then-write it replaced left a zero-length window that
Ctrl-C, Docker reaping the helper, or a suspend could land in. The fsync matters
on its own: on ext4/XFS a rename can become durable while the new file's data
blocks are not, which resurrects the empty-file case. The rename also replaces
the destination's mode, which incidentally repairs a config restored from a
backup as world-readable (os.WriteFile's perm argument only applies at creation).

An unreadable config no longer degrades into an empty one that the next write
commits. loadConfig returns a usable empty config so read paths can still print
something helpful, but it now marks the unrecoverable cases with
errConfigUnusable, and loadConfigForWrite refuses on that sentinel. This is the
downgrade path: the previous binary hard-gates on Version == 2, so without the
guard a reinstall of an older helper would wipe a v3 file on the first
`docker login`. loadConfig also stops explicitly on a version newer than it
understands instead of falling through the legacy probes to the same empty
config. All six write paths take the guard — get, store, erase, login, logout,
switch. login had the same warn-and-continue-then-save shape as store.

The guard keys on the sentinel rather than on any error, deliberately. The
v2 -> v3 migration returns a fully populated config alongside a "saving migrated
config" error when the directory is not writable, and every pre-v3 user passes
through that path on their next invocation; refusing there would hard-break
`docker pull` for exactly the population that is migrating.

migrateV2toV3 merges DID collisions deterministically. Two v2 entries collapse
onto one v3 key when a handle was renamed and the old entry was never cleaned up,
which is the case v3 exists to fix. The previous loop wrote both into the same
map slot in randomized iteration order, so which account survived varied run to
run, and when the stale one won, get would fail validation and remove it — the
user ended up with no account at all. Iteration is now sorted and collisions
resolve through v2EntryBeats (active entry, then the one holding a secret, then
the smaller key), with the loser donating its secret if the winner has none. The
"No account is dropped" comment was false and is now accurate.

Also deterministic: find() and upsert() resolve their scans through a shared
scanFor helper that prefers DID matches and breaks ties on the smallest key, so
two entries sharing a handle can no longer hand Docker a different secret on each
invocation. upsert additionally refuses to match a handle that already belongs to
a different DID, which previously let it overwrite an unrelated account's DID and
destroy that account's credentials. Nil map entries are tolerated throughout
rather than panicking on Docker's credential path.

resolveHandleDNS is bounded at 2s. It runs synchronously on every store and on
every get for a DID-less account, and net.LookupTXT applies no deadline of its
own, so a blackholing resolver (captive portal, split-horizon VPN) stalled
docker login and docker pull on each invocation.

Tests cover the paths that can lose credentials. Each was checked against the
pre-fix code: the collision, null-entry, DID-theft, find-determinism,
permissions, and out-of-place-write tests all fail or panic without their fix.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-02 19:19:40 -05:00