Refactor sprint planning docs and add templates

Updated AGENTS.md with implementation planning conventions and stream index. Refactored SPRINT_110_ingestion_evidence.md, SPRINT_125_mirror.md, and SPRINT_300_documentation_process.md to use a topic-oriented template, clarify dependencies, task boards, and checkpoint structure. Archived previous sprint details and added new templates and status snapshot files to docs/implplan.

docs/implplan/SPRINT_125_mirror.md

@@ -1,22 +1,61 @@
-# Sprint 125 - Ingestion & Evidence · 110.D) Mirror
+# Sprint 125 · Ingestion & Evidence · Mirror
 
-Active items only. Completed/historic work now resides in docs/implplan/archived/tasks.md (updated 2025-11-08).
+## Topic & Scope
+- Build the deterministic mirror bundle assembler covering advisories, VEX, policy packs, and optional OCI artefacts.
+- Layer DSSE/TUF metadata, time anchors, and CLI automation so air-gapped sites receive verifiable bundles.
+- Wire Export Center and scheduling hooks so mirror creation can be orchestrated automatically.
 
-[Ingestion & Evidence] 110.D) Mirror
-Depends on: Sprint 100.A - Attestor
-Summary: Ingestion & Evidence focus on Mirror.
-Task ID | State | Task description | Owners (Source)
---- | --- | --- | ---
-MIRROR-CRT-56-001 | TODO | Implement deterministic bundle assembler supporting advisories, VEX, policy packs with Zstandard compression and manifest generation. Dependencies: EXPORT-OBS-51-001. | Mirror Creator Guild (src/Mirror/StellaOps.Mirror.Creator)
-MIRROR-CRT-56-002 | TODO | Integrate DSSE signing and TUF metadata generation (`root`, `snapshot`, `timestamp`, `targets`). Dependencies: MIRROR-CRT-56-001, PROV-OBS-53-001. | Mirror Creator Guild, Security Guild (src/Mirror/StellaOps.Mirror.Creator)
-MIRROR-CRT-57-001 | TODO | Add optional OCI image collection producing oci-archive layout with digests recorded in manifest. Dependencies: MIRROR-CRT-56-001. | Mirror Creator Guild, DevOps Guild (src/Mirror/StellaOps.Mirror.Creator)
-MIRROR-CRT-57-002 | TODO | Embed signed time anchor metadata (`meta/time-anchor.json`) sourced from trusted authority. Dependencies: MIRROR-CRT-56-002, AIRGAP-TIME-57-001. | Mirror Creator Guild, AirGap Time Guild (src/Mirror/StellaOps.Mirror.Creator)
-MIRROR-CRT-58-001 | TODO | Deliver CLI `stella mirror create|verify` commands with content selection flags, delta mode, and dry-run verification. Dependencies: MIRROR-CRT-56-002, CLI-AIRGAP-56-001. | Mirror Creator Guild, CLI Guild (src/Mirror/StellaOps.Mirror.Creator)
-MIRROR-CRT-58-002 | TODO | Integrate with Export Center scheduling to automate mirror bundle creation with audit logs. Dependencies: MIRROR-CRT-56-002, EXPORT-OBS-54-001. | Mirror Creator Guild, Exporter Guild (src/Mirror/StellaOps.Mirror.Creator)
+## Dependencies & Concurrency
+- Upstream: Sprint 110.D must deliver the assembler foundation (`MIRROR-CRT-56-001`). Attestor v2 contracts from Sprint 100.A remain required.
+- Mirror sprints share the 120s decade with Policy & Reasoning work but remain independent; avoid adding dependencies on `SPRINT_125_policy_reasoning.md`.
+- Evidence Locker, Export Center, CLI, and AirGap Time guild commitments must be available as soon as assembler code exists.
 
+## Documentation Prerequisites
+- `docs/modules/export-center/architecture.md`
+- `docs/modules/airgap/architecture.md`
+- `docs/modules/devops/architecture.md`
+- `docs/modules/policy/architecture.md` (for provenance expectations)
 
-If all tasks are done - read next sprint section - SPRINT_120_policy_reasoning.md
+## Task Board
+| Task ID | Status | Owner(s) | Dependencies | Notes |
+| --- | --- | --- | --- | --- |
+| MIRROR-CRT-56-001 | TODO | Mirror Creator Guild | Staffing decision | Implement deterministic assembler with manifest + CAS layout. |
+| MIRROR-CRT-56-002 | TODO | Mirror Creator · Security Guilds | MIRROR-CRT-56-001; PROV-OBS-53-001 | Integrate DSSE signing + TUF metadata (`root`, `snapshot`, `timestamp`, `targets`). |
+| MIRROR-CRT-57-001 | TODO | Mirror Creator · DevOps Guild | MIRROR-CRT-56-001 | Add optional OCI archive generation with digest recording. |
+| MIRROR-CRT-57-002 | TODO | Mirror Creator · AirGap Time Guild | MIRROR-CRT-56-002; AIRGAP-TIME-57-001 | Embed signed time-anchor metadata. |
+| MIRROR-CRT-58-001 | TODO | Mirror Creator · CLI Guild | MIRROR-CRT-56-002; CLI-AIRGAP-56-001 | Deliver `stella mirror create|verify` verbs with delta + verification flows. |
+| MIRROR-CRT-58-002 | TODO | Mirror Creator · Exporter Guild | MIRROR-CRT-56-002; EXPORT-OBS-54-001 | Integrate Export Center scheduling + audit logs. |
+| EXPORT-OBS-51-001 / 54-001 | TODO | Exporter Guild | MIRROR-CRT-56-001 staffing | Align Export Center workers with assembler output. |
+| AIRGAP-TIME-57-001 | TODO | AirGap Time Guild | MIRROR-CRT-56-001; MIRROR-CRT-57-002 | Provide trusted time-anchor service & policy. |
+| CLI-AIRGAP-56-001 | TODO | CLI Guild | MIRROR-CRT-56-002; MIRROR-CRT-58-001 | Extend CLI offline kit tooling to consume mirror bundles. |
+| PROV-OBS-53-001 | TODO | Security Guild | MIRROR-CRT-56-001 | Define provenance observers + verification hooks. |
 
-> 2025-11-04: AIAI-31-004A DONE – WebService/Worker wiring plus filesystem queue operational; metrics/logs added; tests executed via `dotnet test src/AdvisoryAI/__Tests/StellaOps.AdvisoryAI.Tests/StellaOps.AdvisoryAI.Tests.csproj --no-restore`.
+## Execution Log
+| Date (UTC) | Update | Owner |
+| --- | --- | --- |
+| 2025-11-13 | Kickoff rescheduled to 15 Nov pending MIRROR-CRT-56-001 staffing; downstream guilds alerted to prepare resource plans. | Mirror Creator Guild |
 
-> 2025-11-04: AIAI-31-006 DONE – REST endpoints enforce scope headers, apply rate limits, sanitize prompts through guardrails, and enqueue execution with cached metadata.
+## Decisions & Risks
+### Decisions
+| Decision | Owner(s) | Due | Notes |
+| --- | --- | --- | --- |
+| Assign primary engineer for MIRROR-CRT-56-001 | Mirror Creator Guild · Exporter Guild | 2025-11-15 kickoff | Without an owner the assembler cannot start and all downstream tasks remain blocked. |
+| Confirm DSSE/TUF signing profile | Security Guild · Attestor Guild | 2025-11-18 | Needed before MIRROR-CRT-56-002 can merge. |
+| Lock time-anchor authority scope | AirGap Time Guild · Mirror Creator Guild | 2025-11-19 | Required for MIRROR-CRT-57-002 policy enforcement. |
+
+### Risks
+| Risk | Impact | Mitigation |
+| --- | --- | --- |
+| Staffing gap for MIRROR-CRT-56-001 persists after kickoff | DSSE/TUF, OCI, CLI, Export tracks slip; Sprint 125 jams the Export Center roadmap. | Escalate to program leadership, reassign engineers from Export Center or Excititor queue. |
+| DSSE/TUF contract debates with Security guild | Signing + transparency integration slips, blocking CLI/Export release. | Align on profile ahead of development; capture ADR in `docs/airgap`. |
+| Time-anchor requirements undefined | Air-gapped bundles lose verifiable time guarantees. | Run focused session with AirGap Time Guild to lock policy + service interface. |
+
+## Next Checkpoints
+| Date (UTC) | Session | Goal | Owner(s) |
+| --- | --- | --- | --- |
+| 2025-11-15 | Mirror evidence kickoff | Assign MIRROR-CRT-56-001 owner, outline scope, confirm downstream staffing. | Mirror Creator · Exporter · AirGap Time · Security guilds |
+| 2025-11-18 | DSSE/TUF design review | Freeze signing profile + manifest shape. | Mirror Creator · Security Guild |
+| 2025-11-19 | Time-anchor policy workshop | Approve requirements for AIRGAP-TIME-57-001. | AirGap Time Guild · Mirror Creator |
+
+## Appendix
+- Previous detailed notes retained at `docs/implplan/archived/SPRINT_125_mirror_2025-11-13.md`.