Stax Dev

What it does

When your agent uses it

• Any feature request
• Refactor in the stax codebase
• : add a command
• Implement X in stax

Example prompts

• “add a command”
• “implement X in stax”
• “fix bug”
• “/stax-dev”

Workflow steps

5 steps, taken from the step headings in SKILL.md.

1. 1Context Check
2. 2Plan
3. 3Implement
4. 4Verify
5. 5Fix Loop (if verifier reports failures)

What it can do on your machine

Read from SKILL.md and the folder at commit da27cb8. It shows what the files ask for, not the result of running them.

• Tool permissions

  Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

  From allowed-tools in the SKILL.md frontmatter.

• Runs code

  No scripts in the folder and no shell commands in SKILL.md (its code samples are bash).

  From the folder's file list and the shell code blocks in SKILL.md.

• Network

  No URLs in SKILL.md.

  From URLs in SKILL.md, links to its own repository left out.

• Credentials

  Names no API keys, tokens, secrets or passwords.

  From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Stax Dev loads about 987 tokens when it runs, and up to ~2k if it reads all its reference files. Until then it costs about 124 tokens; SKILL.md has 267 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it

~124

When it runs · the whole SKILL.md, loaded when a task matches

~987

With references · SKILL.md plus every file in references/, read only if the agent opens them

~2k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from cesarferreira/stax at commit da27cb8, republished under its MIT licence (© cesarferreira). 267 words, ~987 tokens.

name

stax-dev

description

Development harness for the stax Rust CLI project. Use for any feature request, bug fix, new command, code change, or refactor in the stax codebase. Triggers on: "add a command", "implement X in stax", "fix bug", "change how stax does Y", "make stax support Z", "update stax to", "I want stax to". Also triggers for follow-up work: "fix the error", "try again", "re-run", "update the implementation", "that didn't work". Do NOT trigger for pure questions about stax usage or git concepts.

ls .claude/plans/stax-plan.md 2>/dev/null

Agent(
  subagent_type: "stax-planner",
  model: "opus",
  prompt: "
    Project root: /Users/cesarferreira/code/github/stax

    Request: <user's full request verbatim>

    Produce a complete implementation plan following your output format.
    Read patterns.md at .claude/skills/stax-dev/references/patterns.md first.
  "
)

Agent(
  subagent_type: "stax-implementer",
  model: "sonnet",
  prompt: "
    Project root: /Users/cesarferreira/code/github/stax

    Execute this implementation plan exactly:
    ---
    <full plan content>
    ---

    Read patterns.md at .claude/skills/stax-dev/references/patterns.md first.
    Read each file before editing. Do not run build or tests.
    Output the CHANGED/CREATED summary at the end.
  "
)

Agent(
  subagent_type: "stax-verifier",
  model: "opus",
  prompt: "
    Project root: /Users/cesarferreira/code/github/stax

    Verify the changes just implemented. Run cargo check, clippy, fmt --check,
    then targeted tests with this filter: <Verification Steps from plan>.
    Report all results per your reporting format.
  "
)

Agent(
  subagent_type: "stax-implementer",
  model: "sonnet",
  prompt: "
    Project root: /Users/cesarferreira/code/github/stax

    The previous implementation had errors. Fix them.

    Original plan:
    ---
    <plan content>
    ---

    Verifier errors to fix:
    ---
    <verifier output>
    ---

    Read each file before editing. Output the CHANGED summary.
  "
)

© cesarferreira, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 1 other file (references) in .claude/skills/stax-dev of cesarferreira/stax.

• SKILL.md
• references/patterns.md

Open the folder on GitHubat commit da27cb8