feat(using-system-snapshot): new skill v0.1.0

Thin read-only skill wrapping the single meta_system_snapshot MCP call
(poller status + local docker + cached cross-project task summary).
Replaces the scatter of tasklist / docker ps / manual meta_status.

Core rule: no claim about poller / local-docker / task-load state
without calling the tool in the current turn. Output = three lines,
one per section (docker lists only problem containers; tasks gives
Sigma active/blocked + busiest 2-3 projects). Liveness split documented
(poller+docker live, tasks from cache). Scope boundaries: deep single-
container diagnosis -> using-vds-ops / docker logs; precise per-task work
-> using-projects-meta. Read-only, no per-session grant.

Output shape verified by a live snapshot call 2026-06-09.
Wiki: concepts/using-system-snapshot-design.md + index + log.
TDD N/A (markdown policy artifact); behavioral smoke-test = paired
skill-using-system-snapshot-review task.

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

.wiki/concepts/using-system-snapshot-design.md

@@ -0,0 +1,59 @@
+---
+title: using-system-snapshot skill design
+type: concept
+updated: 2026-06-09
+---
+
+# using-system-snapshot skill design
+
+New policy+technique skill (v0.1.0) wrapping the single MCP call
+`mcp__projects-meta__meta_system_snapshot`. Replaces the old scatter of
+`tasklist` + `docker ps` + a manual `meta_status` read with one round-trip for
+session-start ops orientation.
+
+## Why a skill
+
+The failure mode it guards: an agent asserts "the poller is running" / "all
+containers are up" / "you have N active tasks" from memory or a stale earlier
+snapshot, without re-checking. The skill makes the rule explicit — **no claim
+about poller / local-docker / task-load state without calling the tool in the
+current turn**. Mirrors the read-only, no-grant posture of [[using-vds-ops]].
+
+## Tool output shape (verified live 2026-06-09)
+
+Three keys:
+
+- `poller`: `{ running: bool, projects: "<owner/repo …>" }` — **live**.
+- `docker`: `[{ name, status }]` — **local** machine containers (includes
+  `agents-task-runner-*`), NOT the VDS. Status strings like `Up 4 hours`,
+  `Up 26 hours (healthy)`; problems show as `Restarting` / `Exited` /
+  `(unhealthy)` / `Created` / `Paused`. **live**.
+- `tasks`: `{ "<owner>/<repo>": { active, blocked } }` — **from the
+  projects-meta cache**, so approximate.
+
+## Design decisions
+
+- **Output = three lines, one per section** (per task spec). Docker line reports
+  `N/N up` when all healthy, else lists only the bad containers; tasks line gives
+  Σ active / Σ blocked + the busiest 2–3 projects. Never dump raw JSON.
+- **Liveness split made explicit.** Poller + docker are read at call time; task
+  counts come from the cache. The skill tells the agent to flag task-count
+  staleness and defer precise per-task work to [[projects-meta-skills]]
+  (`using-projects-meta` Step 0 freshness gate, or local `.tasks/` on disk).
+- **Scope boundaries.** Deep single-container diagnosis (logs/inspect/stats) is
+  explicitly out — that's [[using-vds-ops]] for the VDS or `docker logs`
+  locally. The snapshot only carries name + status.
+- **Read-only, no per-session grant** — same as [[using-vds-ops]]. The tool
+  takes no args; no preview/confirm dance (unlike the projects-meta mutations).
+
+## Prerequisites
+
+Needs `mcp__projects-meta__meta_system_snapshot` (shipped by `projects-meta-mcp`;
+the `meta-system-snapshot` capability lives in `OpeItcLoc03/common`). If the tool
+is absent, the server isn't registered → `setup-projects-meta`.
+
+## TDD note
+
+Markdown policy artifact — no code/test surface (consistent with sibling skill
+tasks). Behavioral trigger smoke-test is the paired `skill-using-system-snapshot-review`
+task, not this implementation task.

.wiki/index.md

@@ -43,6 +43,7 @@ Catalog of all wiki pages. One line per page, organized by type. Updated on ever
 - [session-handoff-skill-design.md](concepts/session-handoff-skill-design.md) — design rationale for the `session-handoff` skill (sliding overwrite into `.tasks/NEXT_SESSION.md`, phrase whitelist + substantive-commit heuristic, optional PostToolUse hook for harness-side determinism, orient+ask default, project scope, cluster 7/7 closure)
 - [using-tasks-session-break.md](concepts/using-tasks-session-break.md) — `using-tasks` v1.2.0 `session_break` marker: task-author-set boolean/string flag; after a task closes 🟢, before `tasks_claim_next`, an autonomous agent prints the verbatim SESSION BOUNDARY line and stops instead of chaining the next task. Absent → unchanged
 - [delegate-task-session-break.md](concepts/delegate-task-session-break.md) — `delegate-task` v0.2.2 — authoring side of the `session_break` marker (consumer = [[using-tasks-session-break]]): pre-flight Q6 + optional template field `session_break: true | "<hint>"`; three set-it cases (domain-switch / milestone / heavy infra); not a default
+- [using-system-snapshot-design.md](concepts/using-system-snapshot-design.md) — `using-system-snapshot` v0.1.0 — thin read-only skill wrapping the single `mcp__projects-meta__meta_system_snapshot` call (poller + local docker + cached task summary); replaces scattered `tasklist`/`docker ps`/manual `meta_status`; core rule = no liveness claim without calling the tool this turn; three-line output; defers deep docker to [[using-vds-ops]] and precise tasks to [[using-projects-meta]]
 - [delegate-task-negative-trigger-fp.md](concepts/delegate-task-negative-trigger-fp.md) — `delegate-task` v0.2.1 FP fix: «создать задачу себе» stem-matched the «создать задачу на агента» positive trigger; abstract "does NOT apply when doing the work yourself" carve-out loses to literal stem-match under the 1%-rule → made the negative literal + routed (→ using-tasks). Verified pos 5/5, neg 4/5 (was 0/5)
 
 ## Packages

.wiki/log.md

@@ -68,4 +68,5 @@ Parseable: `grep "^## \[" .wiki/log.md | tail -20`.
 
 ## [2026-06-09] decision | delegate-task-negative-trigger-fp — `delegate-task` 0.2.0→0.2.1 (PATCH): fixed 5/5-consistent false-positive on «создать задачу себе». Root cause: self-task phrase shares stem «создать задачу» with the «создать задачу на агента» positive trigger; the abstract "Does NOT apply when doing the work yourself" carve-out can't beat a literal stem-match under the 1%-rule. Fix: made the negative literal + routed («создать задачу себе» / «task for myself» / «поставить себе задачу» → using-tasks) in description + body disambiguator («на агента»/«агенту» = delegate; «себе» = own board). Re-verified via fresh-context subagent trigger run: positives 5/5 (no regression), negative 4/5 → using-tasks (was 0/5); the 1 residual miss was an eval-harness artifact (forced skill-name-before-reasoning), not description ambiguity. Concept page written; reusable principle = put the exact colliding negative phrase with an explicit →sibling route, literal beats abstract.
 ## [2026-06-09] decision | delegate-task-session-break — `delegate-task` 0.2.1→0.2.2 (PATCH): authoring side of the `session_break` marker (consumer = using-tasks v1.2.0). Added pre-flight Q6 (after notify): "Session-break после этой задачи? (domain-switch / milestone / heavy infra)"; if yes → set optional template field `session_break: true | "<hint>"` (trailer, next to weight/notify/allow_upgrade; same lowercase frontmatter key using-tasks reads). Usage guidance lists three set-it cases; What-NOT-to-do bullet warns against setting it routinely (it's a real-boundary marker, not a default). Wiki concept page concepts/delegate-task-session-break.md + index. Pairs with using-tasks-session-break.
+## [2026-06-09] decision | using-system-snapshot — new skill v0.1.0: thin read-only wrapper over the single `mcp__projects-meta__meta_system_snapshot` call (poller status + local docker containers + cached cross-project task summary). Replaces the scatter of `tasklist` + `docker ps` + manual `meta_status`. Core rule: no claim about poller / local-docker / task-load state without calling the tool in the current turn (memory + stale earlier snapshot ≠ evidence). Output = three lines, one per section (docker lists only problem containers; tasks gives Σ active/blocked + busiest 2–3). Liveness split documented: poller+docker live, tasks from cache (defer precise work to using-projects-meta Step 0). Scope boundaries: deep single-container diagnosis → using-vds-ops / `docker logs`; docker section is LOCAL, not the VDS. Read-only, no per-session grant (mirrors using-vds-ops). Output shape verified by a live call 2026-06-09. Concept page concepts/using-system-snapshot-design.md + index. TDD N/A (markdown policy artifact); behavioral smoke-test = paired skill-using-system-snapshot-review task.
 ## [2026-06-09] decision | using-tasks-session-break — `using-tasks` 1.1.0→1.2.0 (MINOR): added the `session_break` marker. Task author sets `session_break: true | "<hint>"` in task frontmatter (mirrored as `**Session break:**` on the local board); after the task closes 🟢, before `tasks_claim_next`, an autonomous agent prints the verbatim line `🔚 SESSION BOUNDARY — [slug] закрыта. Рекомендую завершить текущую сессию. Следующий трек: [value | "см. STATUS.md"]` and stops instead of chaining the next task. Absent → behaviour unchanged. Enforced in Task completion step 6 + Rules bullet + format docs. Marker not heuristic: the stop-point is an authoring choice, not a runner guess.