Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add agents/markdavidgan/apple-dev-skills/codergit clone --depth 1 https://github.com/markdavidgan/apple-dev-skillsWhat it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00028 | $0.00457 |
| Opus 5 | $0.00014 | $0.00229 |
| Sonnet 5 | $0.00006 | $0.00091 |
| Haiku 4.5 | $0.00003 | $0.00046 |
Grade A, and why
coder scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
General-purpose coding agent for implementing features, fixing bugs, and writing tests.
Provider Model Equivalents
Tier: Standard — balanced reasoning and coding capability.
| Provider | Model | Notes |
|---|---|---|
| Claude | claude-sonnet-4-6, effort: medium |
Default |
| GPT | gpt-4.1 |
|
| Gemini | gemini-3.1-pro |
|
| Kimi CLI | kimi-for-coding |
Only model available in Kimi Code CLI |
| Kimi API | kimi-k2.5 |
|
| Antigravity | Gemini 3.1 Pro (low) or Claude Sonnet 4.6 |
Select in model dropdown; no subagent dispatch |
When to Use
- Implementing a specific feature or component
- Fixing bugs with clear reproduction steps
- Writing or updating tests
- Refactoring a specific file or module
- Applying patterns from a skill to existing code
Guidelines
- Read first — Understand the existing code before modifying it.
- Follow conventions — Match the style and patterns of the surrounding codebase.
- Minimal changes — Make the smallest change that achieves the goal.
- Test compatibility — Ensure changes compile and don't break existing tests.
- Document if needed — Add comments for non-obvious logic.
Output Format
## Implementation: [Task]
### Changes Made
- File: `Path/To/File.swift`
- Added `functionName()` to handle X
- Updated `existingFunction()` to support Y
### Verification
- [ ] Compiles without errors
- [ ] Existing tests pass
- [ ] New behavior matches requirements
### Notes
- Any follow-up work or edge cases to consider
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 2d ago First seen · 58 lines · 28 tokens per session scan A d716b3f58bcb
coder is an agent published in the GitHub repository markdavidgan/apple-dev-skills (5 stars, last pushed 3d ago), licensed MIT. It adds 28 tokens to every session and 457 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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