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Mastodon sends FEP-7aa9 FeatureRequest activities without an actor, so Fedify rejected them with 400 Missing actor before any listener ran. Rather than adding another activity-specific exception, the inbox now records who it authenticated independently of the declared actor, and binds that evidence to the exact JSON-LD interpretation it verified. Inbox and queue: - Every JSON-LD processing step of a delivery goes through a request-scoped context snapshot, so a mutable remote context cannot give verification and dispatch different meanings. The snapshot is stored in queued inbox messages, and workers and retries replay it without loading contexts again; an expanded-view digest guards it. - InboxContext.authentication exposes the HTTP request signers, the LDS/OIP document signers (all proofs, DID authorities for portable actors), and the expanded activity. isActorAuthenticated() compares actors, canonicalizing FEP-ef61 portable IDs. - InboxListenerSetters.on() takes an allowActorless option. An activity that declares no actor at all reaches such a listener only if a principal was authenticated and its ID shares that principal's origin. Anonymous or blank-node actors still count as declared. A successful verification of zero proofs is not authentication, and an owner's proof is preferred to a relay's Linked Data Signature. - Context.routeActivity() provides evidence too, and dispatches the object it verified or fetched. - MessageQueue.maxMessageSize lets the inbox process an activity in-request when its message would not fit the queue; Deno KV declares it. Queue workers now honor the idempotency strategy. - A key whose owner document cannot be fetched for now is reported as a retryable key fetch failure, so that an outage does not let a relay's signature supersede an author's proof. featureInteraction.verifyRequest() always fetches the featured collection from its ID (web origin or FEP-ef61 proof policy, exactly one attributedTo counted on the expanded document), never trusting an embedded collection, and binds the request to the authenticated interpretation. A request without an actor is accepted only when the collection owner was authenticated. lookupObject() gains an internal observer that reports the candidate actually returned. Fixes fedify-dev#1289 Fixes fedify-dev#1290 Assisted-by: OpenCode:deepseek-flash Assisted-by: Codex:gpt-6-astra Assisted-by: Claude Code:claude-opus-5-5
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| Check name | Status | Explanation | Resolution |
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| Docstring Coverage |  |
Docstring coverage is 59.26% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 108 functions across 37 files. (3 skipped… | Write docstrings for the functions missing them to satisfy the coverage threshold. |
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Check name Status Explanation Description check The description clearly explains the inbox authentication, actorless activity, queue, and interaction-control changes. Title check The title accurately and concisely identifies the primary change: separating inbox authentication evidence from the declared actor. Linked Issues check The PR meets the coding requirements in #1289. The inbox records verified HTTP request principals separately from the declared actor. Actorless activities reach only listeners withallowActorless, a…Out of Scope Changes check The changes remain connected to #1289. The generic listener option provides a safe opt-in for the actorlessFeatureRequestcase. Authentication evidence, context snapshots, queued-message replay, qu…
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Docstring coverage is 59.26% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 108 functions across 37 files. (3 skipped: 3 unsupported.)
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Review comments at @changes.d/fedify/inbox-authentication.md:
- Around line 1-6: Define the FEP-7aa9 reference link so the changelog
references render as links. In changes.d/fedify/inbox-authentication.md lines
1-6, add the FEP-7aa9 URL to the links front matter. In CHANGES.md lines 23-25,
unescape the FEP-7aa9 reference and add its URL to the reference block; in
CHANGES.md lines 167-168, unescape the same reference to use that definition.
Review comments at @packages/fedify/src/federation/inbox-view.ts:
- Around line 497-503: Update buildVerifiedActivityView() to track the URLs
requested by expandDocument() through its snapshot loader, then serialize only
snapshot entries whose policy matches source.policy and whose URL was requested
during expansion. Do not include unrelated contexts loaded elsewhere during the
delivery.
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CHANGES.mdchanges.d/denokv/max-message-size.mdchanges.d/fedify/inbox-authentication.mdchanges.d/interaction-controls/actorless-feature-requests.mdchanges.d/testing/inbox-authentication.mddocs/manual/inbox.mddocs/manual/interaction-controls.mddocs/manual/mq.mdpackages/denokv/src/mod.tspackages/fedify/src/federation/activity-listener.tspackages/fedify/src/federation/builder.tspackages/fedify/src/federation/context.tspackages/fedify/src/federation/federation.tspackages/fedify/src/federation/handler.test.tspackages/fedify/src/federation/handler.tspackages/fedify/src/federation/inbox-actorless.test.tspackages/fedify/src/federation/inbox-authentication.test.tspackages/fedify/src/federation/inbox-authentication.tspackages/fedify/src/federation/inbox-report.tspackages/fedify/src/federation/inbox-view.test.tspackages/fedify/src/federation/inbox-view.tspackages/fedify/src/federation/inbox.test.tspackages/fedify/src/federation/inbox.tspackages/fedify/src/federation/middleware.test.tspackages/fedify/src/federation/middleware.tspackages/fedify/src/federation/mod.tspackages/fedify/src/federation/mq.test.tspackages/fedify/src/federation/mq.tspackages/fedify/src/federation/queue.tspackages/fedify/src/sig/key.tspackages/fedify/src/sig/ld.tspackages/fedify/src/sig/proof.test.tspackages/fedify/src/sig/proof.tspackages/fedify/src/testing/context.tspackages/interaction-controls/src/collection.tspackages/interaction-controls/src/control.tspackages/interaction-controls/src/evidence.tspackages/interaction-controls/src/feature.test.tspackages/interaction-controls/src/feature.tspackages/interaction-controls/src/loaders.tspackages/interaction-controls/src/types.tspackages/testing/src/context.tspackages/vocab-runtime/src/internal/portable-dereference.tspackages/vocab/src/lookup.test.tspackages/vocab/src/lookup.ts
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The verified view of an inbox activity serialized every context response the delivery's snapshot had recorded for its policy, including those loaded by other steps such as parsing key documents. Queued messages carried responses they never needed, which also made them reach maxMessageSize, and be processed in-request, sooner. The view now records the URLs its own expansion requests and keeps only those entries. The snapshot loader also drops a response's `tag`: jsonld.js caches a context tagged "static" across operations without asking the loader again, which would leave it out of the recorded URLs and out of the snapshot. fedify-dev#1299 (comment) Assisted-by: Claude Code:claude-opus-5-5
The new entries referred to FEP-7aa9 without defining the link, so the generated changelog escaped the brackets and showed them literally. Sacho's links front matter only takes reference numbers, so the fragments define the link in their bodies, as other FEP references do. CHANGES.md keeps a single definition of each label, so the copy in the 2.4.0 section gives way to the new one. fedify-dev#1299 (comment) Changelog: none Assisted-by: Claude Code:claude-opus-5-5
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Mastodon sends FEP-7aa9
FeatureRequestactivities without anactor, so Fedify answered them with400 Missing actorbefore any listener ran. Instead of another type-specific exception, the inbox now records who it authenticated independently ofactor, and lets listeners decide what that authorizes. #1291 explored aFeatureRequestbridge; its review threads informed this implementation and its regression tests.Fixes #1289 and #1290.
Bind authentication to the parsed activity
InboxContext.authenticationlists the HTTP request signers and the LDS/OIP document signers separately, so a relay's HTTP signature never stands in for the author of a forwarded document. Principals come only from the verification attempt that produced the dispatched activity, not from observation records. Verification that succeeds without verifying any proof authenticates nobody.isActorAuthenticated()does the comparison, matching FEP-ef61 portable IDs canonically.Reloading remote contexts between parses could make verification and dispatch interpret the same document differently. A request-scoped context snapshot now memoizes every context response, so verification, dispatch, and the expanded view exposed to listeners agree. The snapshot travels inside the queued message, so workers and retries replay the same interpretation without loading contexts again; an expanded-view digest guards the replay. Storing it externally was rejected because its lifetime would not follow the message.
Typed parsing drops anonymous and blank-node values, so the inbox checks the expanded view to decide whether
actoris absent: anactorthat ID accessors cannot read still counts as declared and never falls back to a principal.Opt-in per listener
Actorless activities reach only listeners registered with
allowActorless, and only with an authenticated principal sharing the activity ID's origin. Existing listeners assume an authenticated actor; delivering actorlessUndoorDeleteto them could let any signer act on objects they match only byobject.Authorization in
featureInteractionfeatureInteraction.verifyRequest()takesctx.authenticationand checks that the request matches the one Fedify authenticated, including everyactor,object, andinstrumentvalue. The collection is always fetched from its ID, through an internallookupObject()observer that sees the candidate actually returned, so web collections keep their origin check and portable ones their proof policy. Its owner is the singleattributedTovalue of that document. Embedded collections are no longer trusted, since anyone could attribute someone else's collection to themselves.Queue size
Inlining the snapshot grows messages, so
MessageQueue.maxMessageSizelets the inbox process an oversized activity in-request instead of losing it. The check uses a conservative estimate chosen to exceed Deno KV's structured serialization size. Workers now use the configured idempotency strategy, so in-request and queued processing share records; older worker records are still honored.