feat(rc): viewer-host safety primitives, ported from #108 with refits (RC-02) - #147
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… (RC-02) The security-critical core of the RC viewer host, built against current main rather than merged from PR #108 (OPEN, draft, c7ac06d, DIRTY, 75 files). Provenance and rejection map are in docs/specs/2026-09-06-rc-02-viewer-host.md. device_runtime/identity.ts gains loadEnrollmentMetadata(). loadEnrollment() returns the full EnrollmentRecord including device_token and device_command_key; RC is the process that publishes observation events and must hold neither. The projection is field-by-field rather than a rest spread, so a future secret added to EnrollmentRecord cannot ride along silently. This is refit §5.1: PR #108 defaulted to a synthetic `dev_<uuid>`, which is a self-asserted string that authenticates nothing. rc/receipts.ts decides when the durable cursor may move. PR #108's validator checked batch coverage, duplicate ids, the rejected flag, and positive safe integers — necessary, not sufficient. It would have accepted sequences running backwards within a batch, sequences at or below the cursor the host already recorded, and a receipt carrying a digest for different bytes. The first two let a broker replay stale sequence numbers to make the host drop events it never really stored; the third is the RC_EVENT_ID_CONFLICT binding. All three are now checked, and every ambiguity resolves to preserve-the-batch: re-sending is cheap and deduped broker-side, while advancing wrongly loses a viewer's session permanently. The validator returns a reason rather than a boolean so the host can say honestly why it did not advance. rc/viewer_profile.ts mirrors the Cloud projection merged as 39a16029. Exactly ["observe"], no `controller` presence role, and `transcript` excluded — v1 is a structured-event view, and bounded summaries need a per-session exposure choice that does not exist yet. The control-vocabulary tokenizer splits snake_case, camelCase, PascalCase, dotted and kebab from the start: the Cloud side shipped a tokenizer that treated `emergency_stop` as one opaque word and its own tests caught it, so this mirror begins with the fix. rc/redaction.ts is PR #108's allowlist sanitizer, which was good code and is ported nearly intact. Two changes: the event vocabulary is imported from viewer_profile rather than restated, so the allowlist and the projection cannot drift; and `transcript` is gone with its entry. Detector reuse is unchanged — SENSITIVE_KEY, redactEnvValues and redactInline still come from core/redaction.ts, so a new detector there protects this sink too. Tests: 60, including a source-read guard asserting no RC module references loadEnrollment, device_token, or device_command_key — the same technique child_env.test.ts uses — plus the stale-cursor replay case, the digest-mismatch case, control vocabulary in six naming styles, and a seeded token asserted absent from sanitizer output. SCOPE: this is the primitives layer. The host client itself (transport, outbox persistence, heartbeat, attach/reattach) and the `aether rc` command surface are the next commit in this lane. Refits §5.2 (custody-or-do-not- activate) and §5.4 (failed revoke_pending is a hard quarantine — PR #108 calls persist() there without checking its return) land with the host, since neither is meaningful without it.
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Lane
RC-02— the Agent Remote Control viewer host. Built againstmain@28403f0e, not merged from PR #108.Spec:
docs/specs/2026-09-06-rc-02-viewer-host.md· Cloud counterpart:viewer_profile.py(RC-01, merged39a16029).Supersedes #108— see §3 of the spec for the provenance and rejection map. PR #108 is OPEN, draft,c7ac06d8,DIRTY, 75 files.What's here
device_runtime/identity.tsloadEnrollmentMetadata()— identity fields, never the secretsrc/receipts.tsrc/viewer_profile.tsrc/redaction.tsThe three refits worth reviewing
§5.1 — canonical enrollment.
loadEnrollment()returns the fullEnrollmentRecordincludingdevice_tokenanddevice_command_key. RC publishes observation events and must hold neither, so it gets a projection — field-by-field, deliberately not a rest spread, so a future secret added toEnrollmentRecordcan't ride along silently. PR #108 instead defaulted to a syntheticdev_<uuid>: a self-asserted string that authenticates nothing.§5.3 — receipts. PR #108's validator checked batch coverage, duplicate ids, the
rejectedflag, and positive safe integers. Necessary, not sufficient — it would have accepted:The first two let a broker replay stale sequence numbers to make the host drop events it never really stored. The third is the
RC_EVENT_ID_CONFLICTbinding. All three are checked now, and every ambiguity resolves to preserve the batch — re-sending is cheap and deduped broker-side, while advancing wrongly loses a viewer's session permanently. The validator returns a reason, not a boolean, so the host can say honestly why it didn't advance.Digest reuse, not a fourth spelling.
payloadDigestdelegates todevice_runtime/canonical_json.ts. AETHER-CLOUD already carries three functions namedcanonical_digestthat disagree on non-ASCII input; adding a fourth on the boundary that decides whether a viewer's events get dropped would be the worst possible place for it.What I kept from #108, and why
remote_redaction.tswas good code — a real allowlist with per-event-type keys, path relativization, and detector reuse fromcore/redaction.ts. It's ported nearly intact. Two changes: the event vocabulary is now imported fromviewer_profile.tsinstead of restated, so the allowlist and the projection can't drift; andtranscriptis gone with its entry.The tokenizer starts with the Cloud fix already applied: RC-01 shipped one that treated
emergency_stopas a single opaque word and its own tests caught it. No reason to repeat that here.Test plan
Includes a source-read guard asserting no RC module references
loadEnrollment,device_token, ordevice_command_key— the techniquechild_env.test.tsalready uses — plus the stale-cursor replay case, digest mismatch, control vocabulary in six naming styles, and a seeded token asserted absent from sanitizer output.CI is authoritative for the full suite.
⚠ Scope: this is the primitives layer, not the whole lane
Not here: the host client (transport, outbox persistence, heartbeat, attach/reattach) and the
aether rccommand surface.Consequently refits §5.2 and §5.4 are not implemented yet — neither is meaningful without the host:
revoke_pendingwrite must be a hard local quarantine — note PR feat(rc): /rc remote-control host (AETHER-AGENT-LIVE-01 R2, stacked on #107) #108 callsthis.persist()there without checking its return, so that gap is real and still openNothing is wired into a command or the session yet, so this PR changes no runtime behaviour. It lands the pieces the host will be built on, each independently tested, rather than a 559-line port reviewed in one gulp.
READY_FOR_MERGE=true·MERGED=false·ENABLED=false