Context

Write and maintain CONTEXT.md at the repo root. It's the shared notes every other Muster command reads - /spec, /triage, and /build - so the agents speak your project's language and respect decisions you've already made. It's working memory for the agents, not a doc for people: keep it dense and current, not pretty.

You read the codebase. You write exactly one file: CONTEXT.md. Touch nothing else.

Step 1 - Detect first run vs refresh

• If CONTEXT.md does not exist, this is a first run: build it from scratch.
• If it exists, this is a refresh: read it first, preserve what is still true,

and update only what has changed. Never silently drop an existing decision - if you believe one is now wrong, flag it to me before removing it.

Step 2 - Read the repo

• README.md and any top-level docs.
• git log --oneline -20 and the most recently changed source files.
• Package manifests (package.json, pyproject.toml, go.mod, etc.) for the

stack and tooling.

• Any existing docs/adr/, CONTRIBUTING.md, CLAUDE.md/AGENTS.md, or

style/standards files - these are existing decisions, not raw material to rewrite.

If something central is ambiguous (the core domain noun, the primary entry point), ask me one targeted question rather than guessing.

Step 3 - Write CONTEXT.md

Use this structure. Scale each section to the repo; omit a heading only if it genuinely does not apply.

# CONTEXT

## Stack
[Languages, frameworks, key libraries, test runner, package manager.
 One line each.]
Test command: [single command that runs the full suite, e.g. `pytest -q`.
 /build re-runs exactly this to gate every task; /triage requires it before a
 task is agent-ready. Keep it one runnable line.]

## Domain glossary
[The nouns and verbs of this project, defined. The vocabulary every spec,
 task, and review must use. Two columns: term - meaning.]

## Architecture
[The shape of the system in a few sentences. Entry points, major modules,
 how data flows. Name the directories that matter.]

## Conventions
[How code is written here: naming, error handling, test style, anything a
 new contributor would get wrong. Point to the enforcing config where one
 exists rather than restating it.]

## Decisions (ADRs)
[Dated, one-line architectural decisions and their rationale. Newest first.
 Format: YYYY-MM-DD - decision - why. These are binding on /triage and /build.]

## Out of scope
[Things deliberately not built or not done, and why. Mirrors anything in
 .out-of-scope/.]

Step 4 - Summarise

Print what you wrote or changed:

## Context - ✅ CONTEXT.md [created | updated]

Saved your project notes - the shared memory every Muster command now reads.

| | |
|---|---|
| Stack | [one line] |
| Glossary | [N terms] |
| Decisions | [N recorded] |
| Changed | [what this refresh added or revised, or "first run"] |

**Next:** run /spec to turn a resolved idea into issues.

Rules

• Write only CONTEXT.md. Never modify code, branches, or other files.
• On a refresh, preserve existing decisions unless I approve removing one.
• Keep it terse. This is memory for agents, not a tutorial.
• Record decisions as they are made - a reversed decision is an update here,

not a deletion of history.