fix-attempt-runtime-state-namespace

Metadata

Description

## Objective
Eliminate cross-task collisions in `.wg/attempts/attempt-G-N`: attempt IDs are task-local, but observer/Pi runtime storage is globally keyed only by the bare attempt ID. After service restart, `flip-first-required-gate` began at attempt-0-1 while historical attempts 1–27 already existed; every spawn preparation hit `observer source tuple mismatch`, rolled back, and incremented until an unused number. No worker launched, but the coordinator produced a reservation storm and `wg show` projected unrelated stale Pi state.

## Requirements
- Key all attempt runtime state by authoritative `(task_id, generation, attempt_id, fence, lease)` or a content-addressed namespace; bare attempt ID must never identify storage globally.
- Preserve and resolve historical flat attempt directories read-only; migrate/lazily index without deleting or relabeling evidence.
- Preparation must detect an occupied foreign tuple before creating/removing worktrees, perform at most one breaker-neutral reconciliation, and either use the correct namespace or stop with one actionable diagnostic—never reservation-loop through IDs.
- Watchdog/show/finalizer/observer must never read another task’s state, even during rollback/restart.
- Preserve exact-session, candidate, process epoch, monotonic reservation and first-terminal fencing.

## Validation
- [ ] Two tasks both use `attempt-0-1` concurrently/repeatedly with distinct observer/Pi/finalizer state and no collision.
- [ ] Replay the 1–27 historical-directory shape; the next task launches once without source tuple mismatch or reservation storm.
- [ ] Foreign stale state cannot appear in `wg show` for a new task.
- [ ] Crash/restart at preparation and rollback is idempotent and breaker-neutral.
- [ ] Historical evidence remains byte-identical and readable.
- [ ] Existing spawn preparation, watchdog, observer and finalization smokes pass; fmt/clippy/tests/smoke, commit/push, `wg done`.

Depends on

• done flip-first-required-gate
• done fix-abandoned-dependency-readiness

Required by

• (none)

Log

• 2026-07-28T13:42:44.706173529+00:00 Task paused
• 2026-07-28T13:42:44.803338544+00:00 Task published
• 2026-07-28T16:26:36.345726160+00:00 Spawn preparation deferred before launch permit; rollback is complete and no circuit-breaker charge was recorded. Repair the reported checkout/configuration condition and retry: spawn transaction for agent-932 rolled back (task remains dispatchable; rollback diagnostics: complete): failed to establish isolated-worktree observer baseline: observer source tuple mismatch
• 2026-07-28T16:28:22.241059615+00:00 Spawned by coordinator --executor pi --model openai-codex:gpt-5.6-sol --isolation required-worktree
• 2026-07-28T16:28:37.959333592+00:00 Starting implementation: tracing attempt directory construction, tuple validation, spawn preparation rollback, and all observer/Pi/show/watchdog/finalizer consumers. Staying inline initially because the namespace primitive and consumers are tightly coupled.
• 2026-07-28T16:50:11.706218856+00:00 Implemented content-addressed attempt runtime namespaces bound to task/generation/attempt/fence/lease; exact-only historical flat resolution; pre-worktree foreign-slot preflight; namespaced spawn observer/Pi metadata; exact show/live/watchdog/finalizer/stream-bridge/observer restart consumers. Added permanent 1–27 + concurrent attempt-0-1 smoke and updated existing fixture path helpers. Focused unit/integration and observer/Pi/finalization/spawn smokes pass.
• 2026-07-28T17:01:30.687584517+00:00 Validation: cargo fmt --check and plain cargo clippy pass. Full cargo test: 3030 passed, 36 ignored; only 7 known dependency-baseline profile::named env/lock-poison failures (same as flip-first-required-gate), no attempt-runtime/spawn/watchdog/observer/finalization failures. Owned namespace smoke plus Pi native/session/continuation, isolated observer, candidate finalization, spawn preparation recovery smokes pass.
• 2026-07-28T17:05:27.854552385+00:00 Committed: 72fd08d4 — pushed to remote. Installed all global binaries from the committed worktree with cargo install --path . --locked.
• 2026-07-28T17:07:06.099569577+00:00 Task marked as done