D957 — The repository's skills and agents take the cartographer- prefix and pair by name

Decision. Every skill and agent of this repository is named cartographer-<…>. A skill is verb-object (cartographer-propose-plan, cartographer-implement-plan, cartographer-develop-live, cartographer-review-pr, cartographer-audit-clients); an agent is a role noun that pairs with its skill (cartographer-plan-implementer, cartographer-live-implementer, cartographer-contract-reviewer, cartographer-security-reviewer, cartographer-source-reader). An agent program is a client in names, descriptions and CONTRIBUTING. A description opens with "Use when …" and the trigger words, and lists every spawner. Kiro agents carry tools, and a read-only agent has the edit tools removed on Claude Code, OpenCode and Copilot CLI.

Why. In a user's catalogue next to other projects' skills, review-pr or reader collide or mislead; the old names mixed word orders, did not pair (implement-issue with plan-implementer) and hid what an agent reviews. A Kiro agent without tools has none (D300), and read-only held on OpenCode only. The cost is a one-time rename of every pointer.

Alternatives rejected. Prefixing only the agents: the skills collide too. Renaming the Go identifier provider and docs/harnesses.md: historical decisions link that file. Rewriting old decisions and CHANGELOG.md: they are records, so they keep the old names (the one dangling-path check exempts them for the old skill directories). Renaming the bundled skills here: they reach users, so it is a separate, breaking plan.

Consequences. Read-only is enforced against edits only: those three clients keep a shell (go test needs one), so beyond edits it is instructional. On Kiro it is instructional alone (["*"], tool names unverified), pinned as a prompt sentence. TestRepoSubagentsSayTheSameThingOnEveryClient pins Kiro tools and the read-only restrictions. Kiro's read-only agents list ["*"] because the ledger names no read-only tool set; Copilot's list uses the documented read, search and execute aliases. A new skill or agent takes the prefix and the description shape.