standup git:20260925.9fccf88B

Immutable. This exact content never changes and is served at /api/v1/blob/460472b9ac79d2d3.

---
name: standup
description: Brief on concurrent sessions — who else is working, in which repos, on which files, and what landed underneath you. Use when a commit appears that you did not make, before touching a shared file, or when orienting mid-task in a busy workspace.
allowed-tools:
  - Bash
  - Read
---

# Standup

`/remember --project` answers *what has happened in this project*. `/standup` answers *who
else is in it with me right now* — the peer view.

Every changelog event already carries `session_id`, `project`, `cwd` and a
summary naming the file or the commit, so this needs no new capture. It groups
what the hooks wrote by session instead of by project.

Before running, resolve `ROOT` to the Session Cartographer plugin root. Prefer
`CARTOGRAPHER_ROOT`, then `CLAUDE_PLUGIN_ROOT` or `PLUGIN_ROOT`. Otherwise
derive it from this skill's base directory (`../..` from `skills/standup`), with
the conventional checkout as a legacy fallback.

## The roster

```bash
node "$ROOT/scripts/cartographer-standup.js" --since 6h
```

Reports every session with logged activity in the window: provider, projects, idle time, span,
event count, and its last commits (subjects recovered from git when the corpus
blanked them). `●` means an event was logged inside the last 20 minutes; `○`
means the last logged event is older. Neither proves process liveness. Your own session is marked `(you)` when a session environment variable or
the freshly logged invocation identifies it. Use `--me <full-session-id>` if a
standalone shell did not log this invocation. Displayed ids expand beyond eight
characters whenever two sessions share the same prefix.

Scope it when the workspace is loud:

```bash
node "$ROOT/scripts/cartographer-standup.js" --project widget-web --since 12h
```

## The part that matters

Read **CONTENTION** first; the roster is ambient. Two sessions awake is normal
and ignorable. Two sessions editing the same file is the thing that quietly
costs an hour, and it is the only line in the output that should change what you
do next.

- **Project contention** is the weak signal — expected in a repo under active
  work. Note it, do not act on it.
- **File contention** is the strong signal. Before you edit a file listed there,
  re-read it from disk rather than trusting anything you read earlier in the
  session. For separate worktrees, inspect the peer's changes as well as your
  own file; the copies can diverge without changing one another.

Three things shape that list:

- **Workspace-root and worktree directory *names*** are filtered out of the
  *project* line via `scripts/non-projects.js` — five sessions "sharing" `dev`
  is the filesystem, not a collision. That filter never touches the *file* list:
  a file's identity is its path, and two sessions running from the workspace
  root collide on a file just as hard as two in a named repo.
- **A worktree edit and a main-checkout edit of one repo file are one file.**
  Claude's `repo/.claude/worktrees/<name>/js/x.js` layout collapses directly.
  Codex's `~/.codex/worktrees/<id>/<repo>/js/x.js` layout is matched through
  Git's common directory, cached per worktree. The output flags the result as
  `[same file, separate worktrees]`. A Codex worktree that Git cannot verify is
  counted in `NOT COUNTED`; matching directory names alone are insufficient.
- **`--project` scopes contention as well as the roster.** A session logged
  under the workspace-root label `dev` stays in scope when a resolved file path
  belongs to the requested project. The roster marks that match `(file)`.

## What it could not count

A silent miss and a clean workspace print the same thing, so the footer says
what fell out:

```
NOT COUNTED — 187 edit candidates did not resolve to a file on disk
(mostly the hook's non-paths; a since-deleted file also lands here);
2 events carry no resolvable session id and were counted, not grouped.
```

The edit hook reads shell source text and is loose by construction — roughly
56% of what it emits is not a path (`r.max`, `n.name`), which is expected. But a
real file deleted or renamed after the edit lands in the same bucket, and its
collision is simply absent from the list above. A large count next to a
suspiciously empty contention section is worth a second look.

The log reports recent activity, not a live process or a shared objective. Two
sessions in one project may be working toward different goals. The proposed
goal-linked briefing and explicit handoff records are not yet part of this
command.

Sentinel session ids (`unknown`, `""`) are counted here and never grouped: they
are truthy and equal to each other, so keying on them would fuse every
unattributed event — across providers — into one phantom session that appears to
collide with everybody.

## Attributing a commit you did not make

When a sha shows up under you — the common trigger for this skill — name its
session directly:

```bash
node "$ROOT/scripts/cartographer-standup.js" --commit c61e0e83 --since 24h
```

Prints the owning session, project, timestamp, files, and how many commits that
session landed in the window. The commit itself must be inside `--since`.
Match on sha or on any substring of the commit
subject. A miss means the window is too short (`--since 3d`) or the commit
predates hook coverage — say which, do not guess at authorship.

## Reporting it

Lead with the collision, not the census. Someone running several concurrent
sessions by design already knows the list; it is not news. Useful:

> `a1986975` landed `c61e0e83` (jukebox chip colours) 50m ago in the same repo.
> No file overlap with your work — `311a6cf7` and `7ca82aba` are both in
> `docs/TUNING.md` though.

Not useful: "there are 9 active sessions."

When a peer session is worth the operator's attention, hand over its Memory
Desk link rather than its id: `http://127.0.0.1:2527/memory?session=<id>`
opens that thread (span, edited files, observations, resume command), and
`&file=<url-encoded abs path>&review=changes` opens the contested file on that
session's bounded diff. The full permalink grammar is in the `/carto` skill
under "Deep links into Memory". Check the host answers 200 first; a link to a
stopped Explorer is worse than an id.

Never claim a session is *currently* running. The log shows last activity, not
liveness — `●` means it was active recently, which is a different claim. Say
"active 6m ago," not "is running."

## Flags

| flag | default | |
|---|---|---|
| `--since` | `6h` | window; `30m`, `12h`, `3d` |
| `--project` | all | restrict roster to sessions labeled with or editing files in this project |
| `--commit` | — | attribute a sha or subject substring to its session |
| `--live` | `20m` | idle threshold for the `●` marker |
| `--me` | inferred | override self-identification |
| `--all` | off | keep your own session in the peer roster |
| `--json` | off | machine-readable; adds `unattributed_events`, `worktrees_unmapped`, per-session `edits_unresolved`, and `worktree_split`/`paths` on each contested file |

Read-only. Writes nothing to the changelog and emits no retrieval telemetry.