test(fleet): correct socket boundary coverage

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

docs/TASKS.md

@@ -61,7 +61,7 @@ Active workstream is **W1 — Federation v1**. Workers should:
 | FCM-M2-001 | done        | Migrate generic launch chain to deterministic `.env.generated` plus strict data-only `.env.local`; quarantine forbidden legacy keys                                    | #758  | codex         | mosaicstack/stack | `feat/758-generated-env-boundary`       | FCM-M1-001, FCM-M1-002                         | 30K      | #772 squash `191efae`; generated/local boundary and private quarantine delivered                                 |
 | FCM-M2-002 | done        | Add generation-guarded local fleet agent create/get/update/delete mutations with plan/dry-run, atomic roster writes, and recovery output                               | #758  | codex         | mosaicstack/stack | `feat/758-fleet-agent-crud`             | FCM-M1-001, FCM-M2-001                         | 30K      | #773 squash `bc5e736`; generation-guarded atomic CRUD and recovery contracts delivered                           |
 | FCM-M3-001 | done        | Implement local roster-owned reconcile/apply plus lifecycle/status/verify/doctor contracts and stable JSON/exit codes                                                  | #758  | codex         | mosaicstack/stack | `feat/758-local-reconciler`             | FCM-M2-001, FCM-M2-002                         | 35K      | #785 squash `4990905`; exact roster-owned systemd/tmux reconcile and lifecycle contracts delivered               |
-| FCM-M3-002 | in-progress | Add isolated systemd/tmux lifecycle, drift, socket, unmanaged-session, crash, and rollback acceptance coverage                                                         | #758  | sonnet        | mosaicstack/stack | `test/758-reconciler-lifecycle-gates`   | FCM-M3-001                                     | 25K      | Started from `4990905`; fake adapters/temp fixtures only; no live lifecycle actions                              |
+| FCM-M3-002 | in-progress | Add isolated systemd/tmux lifecycle, drift, socket, unmanaged-session, crash, and rollback acceptance coverage                                                         | #758  | sonnet        | mosaicstack/stack | `test/758-reconciler-lifecycle-gates`   | FCM-M3-001                                     | 25K      | Canonical v2 named-socket + legacy-v1 default-server boundaries; fake adapters/temp fixtures only                |
 | FCM-M4-001 | not-started | Implement field-complete v1-to-v2 inventory/preview/migrator with alias, lifecycle, env-quarantine, and remote/connector disposition evidence                          | #758  | codex         | mosaicstack/stack | `feat/758-v1-v2-migrator`               | FCM-M1-003, FCM-M3-001                         | 35K      | Preview first; no unreviewed lifecycle inference                                                                 |
 | FCM-M4-002 | not-started | Add reversible canary migration, rollback, stale-projection/orphan classification, and current-host 9-managed/3-unmanaged fixture coverage                             | #758  | sonnet        | mosaicstack/stack | `test/758-migration-rollback-gates`     | FCM-M4-001, FCM-M3-002                         | 25K      | Never starts a previously stopped agent or kills an unproven unmanaged session                                   |
 | FCM-M5-001 | not-started | Deliver the accepted fleet documentation IA, how-to/operations/migration references, and link/example validation                                                       | #758  | haiku         | mosaicstack/stack | `docs/758-fleet-config-operator-docs`   | FCM-M1-003, FCM-M2-002, FCM-M3-001, FCM-M4-001 | 24K      | Must close every checklist item or record an approved deferral                                                   |

docs/scratchpads/758-fcm-m3-002-reconciler-lifecycle-gates.md

@@ -24,8 +24,8 @@ Add broad, behavior-oriented acceptance evidence around the shipped local reconc
 | FCM-M3-002 acceptance concern | Delivered isolated evidence |
 | --- | --- |
 | Systemd/tmux lifecycle | `fleet-reconciler.acceptance.spec.ts` drives apply, reconcile, stop, restart, status, and recovery reconcile through one stateful injected fake host. The fake models exact systemd effects and tmux session observations; no host commands run. |
-| Drift | Named/default socket matrix classifies `missing-session`, `unexpected-session`, and `disabled-running`, including combined drift, while asserting observation emits no lifecycle mutation. |
-| Exact default/named socket targeting | Matrix asserts named calls use exactly `-L mosaic-fleet` and default-socket calls contain no `-L`; recorded calls cannot target an adjacent socket. |
+| Drift | Canonical roster-v2 YAML drives the Commander `fleet status` boundary and classifies `missing-session`, `unexpected-session`, and `disabled-running`, including combined drift, while asserting observation emits no lifecycle mutation. |
+| Exact default/named socket targeting | Canonical v2 requires an explicit non-empty named socket; the parser rejects missing/empty values and the Commander acceptance path asserts exact `-L mosaic-fleet` targeting. A separate canonical legacy-v1 roster loader plus runtime-transport path proves a socket-less compatibility roster targets the literal tmux default server with no `-L`. No unreachable empty-socket v2 fixture is used. |
 | Unmanaged-session classification | Stateful fixtures report sorted `coder0-shadow`/`unmanaged` sessions, then prove an exact roster stop leaves both sessions and the near-collision service intact. |
 | Crash/partial failure | Injected restart failure is applied after the fake effect to model crash/partial truth: result is `lifecycle: incomplete`, the roster is unchanged, and observed runtime may be active. |
 | Rollback/recovery semantics | M3 has no rollback command and explicitly does not claim automatic rollback. The acceptance workflow proves the bounded recovery contract: inspect, then exact reconcile restores the persisted stopped target without a start or fuzzy effect. M4 migration/canary rollback remains outside this card. |
@@ -51,7 +51,7 @@ This card adds acceptance coverage to already-delivered behavior. Test-first app
 
 - Intake and immutable baseline verification complete.
 - Existing coverage inventory confirmed strong unit coverage but no stateful cross-command lifecycle acceptance harness.
-- Added `packages/mosaic/src/fleet/fleet-reconciler.acceptance.spec.ts`: one injected stateful fake systemd/tmux host, temporary canonical roster fixture, five acceptance tests (six matrix cases).
+- Added `packages/mosaic/src/fleet/fleet-reconciler.acceptance.spec.ts`: one injected stateful fake systemd/tmux host, temporary canonical v2 and legacy-v1 roster fixtures, and seven acceptance tests.
 - Production source is unchanged; no product defect requiring an FCM-M3-002 fix was found.
 - `docs/TASKS.md` reconciles only merged M1/M2/M3-001 truth and marks FCM-M3-002 in progress.
 
@@ -59,17 +59,18 @@ This card adds acceptance coverage to already-delivered behavior. Test-first app
 
 All commands ran from `/home/jarvis/src/mosaic-stack-local-reconciler` and passed unless explicitly noted.
 
-- `pnpm --filter @mosaicstack/mosaic exec vitest run src/fleet/fleet-reconciler.acceptance.spec.ts` — 1 file, 5 tests passed (the socket matrix executes six acceptance cases).
-- `pnpm --filter @mosaicstack/mosaic exec vitest run src/fleet/fleet-reconciler.acceptance.spec.ts src/fleet/fleet-reconciler.spec.ts src/commands/fleet-reconciler-command.spec.ts src/commands/fleet-agent-crud-command.spec.ts src/fleet/fleet-agent-crud.spec.ts src/commands/fleet.spec.ts` — 6 files, 256 tests passed.
-- `pnpm --filter @mosaicstack/mosaic test` — final run: 57 files, 825 tests passed.
+- `pnpm --filter @mosaicstack/mosaic exec vitest run src/fleet/fleet-reconciler.acceptance.spec.ts` — final remediation run: 1 file, 7 tests passed; canonical v2 named-socket parsing/Commander status, missing/empty v2 rejection, and canonical legacy-v1 default-server runtime targeting are distinct reachable cases.
+- Focused reconciler/roster/transport command covering acceptance, reconciler, command, CRUD, v2 parser, and runtime transport specs — 8 files, 304 tests passed.
+- `pnpm --filter @mosaicstack/mosaic test` — final remediation run: 57 files, 827 tests passed.
 - `pnpm --filter @mosaicstack/mosaic typecheck` — passed.
 - `pnpm --filter @mosaicstack/mosaic lint` — passed.
 - `pnpm typecheck` — 42/42 Turbo tasks successful.
 - `pnpm lint` — 23/23 Turbo tasks successful.
+- `pnpm exec prettier --check docs/TASKS.md docs/scratchpads/758-fcm-m3-002-reconciler-lifecycle-gates.md packages/mosaic/src/fleet/fleet-reconciler.acceptance.spec.ts` — passed.
 - `pnpm format:check` — all matched files use Prettier style.
 - `git diff --check` — passed with no output.
 - Initial scoped Prettier check found style drift in the new spec and tracking table; `pnpm exec prettier --write ...` remediated it before all final gates above.
-- No live fleet, systemctl, tmux, process, site, migration, canary, deploy, runtime, connector, or remote command was invoked. The sole tmux action after documentation/final evidence is the user-required completion `wait-for` signal.
+- No live fleet, systemctl, tmux, process, site, migration, canary, deploy, runtime, connector, or remote command was invoked.
 
 ## Review boundary