Subagent Development

What it does

When your agent uses it

• Tasks that involve Subagents
• Tasks that involve Planning
• Tasks that involve Regulatory compliance

Example prompts

• “Use the subagent-development skill to execute plans via fresh subagents per task with two-stage review (spec → quality)”
• “/subagent-development”

Requirements

• Pre-approved tools (allowed-tools): Read, Write, Edit, Grep, Glob, Bash, Agent, TaskCreate, TaskList, TaskUpdate, TaskGet

Workflow steps

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

1. 1Read and Parse Plan
2. 2Execute Tasks Sequentially
3. 3Summary Report

What it can do on your machine

Read from SKILL.md and the folder at commit d64db2b. It shows what the files ask for, not the result of running them.

• Tool permissions

  Pre-approves these tools, so the agent can use them without asking each time:

  • Read
  • Write
  • Edit
  • Grep
  • Glob
  • Bash
  • Agent
  • TaskCreate
  • TaskList
  • TaskUpdate

  …and 1 more on the same allowed-tools line.

  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 markdown).

  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

Subagent Development loads about 2.2k tokens when it runs. Until then it costs about 49 tokens; SKILL.md has 887 words of instructions outside code blocks.

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

~49

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

~2.2k

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

• NotePre-approves every shell command (allowed-tools: Bash)SKILL.md

  allowed-tools: Read, Write, Edit, Grep, Glob, Bash, Agent, TaskCreate, TaskList, TaskUpdate, TaskGet

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 softspark/ai-toolkit at commit d64db2b, republished under its Apache-2.0 licence (© softspark). 887 words, ~2,201 tokens.

name

subagent-development

description

Executes plans via fresh subagents per task with two-stage review (spec → quality). Triggers: subagent execution, execute plan, fresh agent per task, spec compliance review.

allowed-tools

Read, Write, Edit, Grep, Glob, Bash, Agent, TaskCreate, TaskList, TaskUpdate, TaskGet

user-invocable

true

effort

high

argument-hint

[plan file or task description]

/subagent-development [plan file or task description]

Read plan
    |
    v
Extract ordered task list
    |
    v
For each task:
    |
    +---> [1] Dispatch IMPLEMENTER subagent
    |         |
    |         v
    |     Handle status (see Status Protocol)
    |         |
    |         v
    +---> [2] Dispatch SPEC REVIEWER subagent
    |         |
    |         v
    |     APPROVED? --no--> fix issues, re-review
    |         |
    |        yes
    |         |
    |         v
    +---> [3] Dispatch QUALITY REVIEWER subagent
    |         |
    |         v
    |     Critical issues? --yes--> fix, re-review
    |         |
    |         no
    |         v
    |     Mark task complete
    |
    v
Next task (or done)

<!-- CLAUDE_CODE_ONLY_START -->

<!-- CLAUDE_CODE_ONLY_END -->

## Subagent Development Report

### Plan
[Plan file or description]

### Tasks Completed
| # | Task | Files Modified | Status | Notes |
|---|------|---------------|--------|-------|
| 1 | ... | ... | Done | ... |
| 2 | ... | ... | Done | ... |

### Deferred Items
- [Any "Important" or "Suggestion" issues not addressed]

### Verification
- [ ] All tasks implemented
- [ ] All spec reviews passed
- [ ] All quality reviews passed (no Critical issues remaining)
- [ ] Tests pass

Spec compliance review MUST pass BEFORE quality review starts.

[ ] Context gathered for this specific task
[ ] Implementer dispatched with correct model
[ ] Implementer status handled per protocol
[ ] Spec review passed (all requirements met, nothing extra, nothing missing)
[ ] Quality review passed (no Critical issues)
[ ] Task marked complete with file list and notes

© softspark, Apache-2.0. 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 3 other files in app/skills/subagent-development of softspark/ai-toolkit.

• SKILL.md
• reference/code-quality-reviewer-prompt.md
• reference/implementer-prompt.md
• reference/spec-reviewer-prompt.md

Open the folder on GitHubat commit d64db2b