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Oliver Kieselbach dbf6e50e2d feat(agent,web,shared): phase_exit gather trigger — one-shot collection at a phase's end

Follow-up to gather-rule phase scoping. One-shot collection at a phase START
already existed (phase_change dedups per (rule, phase)) and at enrollment END
(on_event + enrollment_complete); the END of a specific phase had no trigger.

New trigger value "phase_exit": fires once when TriggerPhase is LEFT (empty =
every phase transition). Together with phase_change it forms the two one-shot
bookends of a phase.

Agent (GatherRuleExecutor.OnPhaseChanged):
- Exit rules are evaluated BEFORE _currentPhase advances, so both the
  TriggerPhase match and the phase-scope gate see the phase being LEFT. A rule
  scoped to DeviceSetup therefore fires on its own exit even though the phase
  being entered is out of scope.
- A transition into Failed fires the exit rules of the failing phase — the
  snapshot at a failure boundary is the point of the trigger.
- Exit of Unknown never fires; a repeated identical phase signal is not a
  transition.
- Dedup key "exit:{ruleId}|{phase}" shares _phaseRulesExecuted with the
  phase_change keys but stays in a disjoint key space, so an enter-rule and an
  exit-rule on the same phase cannot consume each other's slot.

Portal: trigger labels are now "Phase Start" / "Phase End"; the canonical phase
dropdown and the create/save payloads cover both via PHASE_TRIGGERS; the card
renders "entering X" / "leaving X".

No ConfigVersion bump: no new field is transported. Old agents do not know the
value and simply never fire the rule (silent no-op).

Tests: GatherRuleExecutorPhaseExitTests (11) — enter-vs-exit, no refire on
re-entry, empty-triggerPhase, exit-of-Unknown, same-phase-signal, into-Failed,
Complete, scope-against-left-phase, out-of-scope slot preservation, key-space
disjointness, on_change interplay. Build 0 Errors; V2.Core.Tests 1884/1884;
Functions.Tests 3099/3099; vitest 557/557; tsc silent.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

2026-07-21 15:37:48 +02:00

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0.1

Autopilot Monitor — Technical Knowledge Bundle

Contributor-facing technical documentation for Autopilot Monitor, organized as an Open Knowledge Format (OKF) knowledge bundle. Customer-facing product documentation lives at https://docs.autopilotmonitor.com (separate repository).

Architecture

Architecture Guide - High-level architecture overview and solution layout for contributors.

Agent

V2 Agent - How the on-device agent works: runtime overview, decision engine (reducer, signals, completion arms), logs & persistence (signal log, snapshot, crash recovery), Hello wizard un-skip (why a single "WHfB disabled" read never decides completion), Autopilot ZTD diagnostics (event IDs, diagnostic registry, endpoints, error-code map).
Build Counter Blob - How agent build numbers are minted: shared counter blob with ETag-CAS so local and CI builds never collide; CI additionally attests build provenance (Sigstore).
Agent Endpoint Migration - How the backend re-homes agents to a new API base URL via the config channel (backend move or per-tenant region move): live-fetch-only, allowlist-validated on both sides, one hop, kill wins.
MDM Reboot Coalescing - Attributing the mid-ESP coalesced reboot ("second sign-in") to the device-assigned policy URIs that forced it: aggregated DM-Enterprise 2800 observations (neutral, flush-time watermark) + the ANALYZE-ESP-005 advisory gated on an actually-observed reboot.

Rules

Gather Rule Phase Scoping, One-Shot Triggers & Emit-on-Change - Restricting gather rules to enrollment phases (activePhases / activeFromPhase sticky latch), one-shot collection at a phase's start/end (phase_change / phase_exit), and emitMode "on_change" result-dedup.

Backend

Business Timestamps - Why the Azure Tables system Timestamp is never authoritative (migrations reset it), and the OccurredUtc + RowKey-decode compensation for AuditLogs/OpsEvents/Events after the 2026-07-18 migration.

Security & Identity

MCP OAuth Flow - Who authenticates where when connecting an AI client to the MCP server; two identities, three parties plus Entra ID.

Conventions for this bundle

Every concept document is a markdown file with YAML frontmatter; type is mandatory, title, description, resource, tags, and timestamp are recommended.
Use standard relative markdown links between documents (e.g. agent/overview.md, ../architecture.md). Do NOT use the spec's /-prefixed bundle-absolute form — GitHub resolves those against the repo root (missing /docs) and navigation breaks.
Record notable additions and changes in log.md.
index.md and log.md are reserved names — never use them for concept documents.

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