docs: seed revised dual-track workflow plan

docs/plans/2026-03-02-ouroboros-dual-track-workflow-design.md

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+# Ouroboros Dual-Track Workflow Design (Revised)
+
+**Date:** 2026-03-02  
+**Scope:** `docs/ouroboros/86_peak_probability_model_plan.md` and `docs/ouroboros/80_implementation_audit.md`
+
+---
+
+## 1. Goal
+
+Prevent work loss and history contamination while running two parallel tracks, while correcting an invalid starting condition (design commits created on a disposable temporary branch):
+
+- Track A: open and iterate the `86` plan as a dedicated PR.
+- Track B: finalize `80` only after real-operation behavior is confirmed, then reflect completion and close related Gitea open issues.
+
+---
+
+## 2. Constraints and Current Context
+
+- Current temporary branch is disposable and must not remain the authoritative base.
+- Canonical base line for current work is `feature/v3-session-policy-stream`.
+- Final integration strategy is to merge the full `feature/v3-session-policy-stream` line into `main` after operation-level validation is complete.
+
+---
+
+## 3. Approaches Considered
+
+1. Keep using temporary branch and continue from existing design commits.
+2. Create a clean base from `feature/v3-session-policy-stream` and move only plan artifacts as one commit (recommended).
+3. Split into two fresh bases (`86` and `80` separately) immediately.
+
+Recommendation rationale:
+
+- Approach 2 removes temporary-branch contamination risk.
+- It preserves clean lineage with a single "official starting point" commit.
+- It keeps downstream split for `86` and `80` straightforward.
+
+---
+
+## 4. Approved Branch and PR Topology
+
+- Long-lived source baseline: `feature/v3-session-policy-stream`
+- New official base: `base/ouroboros-workflow-20260302` (from `feature/v3-session-policy-stream`)
+- Official base contains only two workflow plan docs squashed into one commit.
+- Track A branch: `task/86-peak-probability-plan` (from official base)
+- Track B branch: `task/80-implementation-audit-closeout` (from official base)
+
+PR direction:
+
+- PR-A (`86`): `task/86-peak-probability-plan -> base/ouroboros-workflow-20260302`
+- PR-B (`80`): `task/80-implementation-audit-closeout -> base/ouroboros-workflow-20260302`
+- Final integration: `feature/v3-session-policy-stream` line merged into `main`
+
+---
+
+## 5. Completion Criteria per Track
+
+### Track A (`86`)
+
+- Open initial PR early with the planning document.
+- Continue iterative concretization in follow-up commits on the same branch.
+
+### Track B (`80`)
+
+- Do not close based on test-command artifacts alone.
+- Close only when modified behavior is confirmed in real operation.
+- Update `80_implementation_audit.md` with:
+  - observed behavior changes,
+  - confirmation timing,
+  - operation-side evidence summary.
+- After `80` real-operation confirmation and doc update, close related Gitea open issues immediately (same phase).
+- Parent issues close only when all child issues are confirmed closed.
+
+---
+
+## 6. Loss-Prevention Rules
+
+- Preserve temporary-branch unmerged changes first (stash or archival commit).
+- Exclude `workflow/session-handover.md` and `docs/ouroboros/86_peak_probability_model_plan.md` from official base-seeding commit.
+- Enforce file-scope separation:
+  - PR-A should avoid `80` edits.
+  - PR-B should avoid `86` edits.
+- Keep commit messages scoped to one track per commit.
+
+---
+
+## 7. Merge Strategy Decision
+
+- For this workflow, prefer merge-based lineage preservation.
+- Because the final promotion unit is the full `feature/v3-session-policy-stream` stream, avoid unnecessary cherry-pick/rebase-surgery unless a contamination incident occurs.
+
+---
+
+## 8. Immediate Next Actions
+
+1. Seed `base/ouroboros-workflow-20260302` from `feature/v3-session-policy-stream` with one squashed workflow-doc commit.
+2. Verify seed commit file scope contains only two plan docs.
+3. Create and open PR-A for `86`.
+4. Complete real-operation confirmation for `80`, update audit doc, then close related Gitea issues (children first, then parent).
+5. Merge validated `feature/v3-session-policy-stream` line into `main`.