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 skills/wedabro/bro-skills/speckit.diffnpx skills add wedabro/bro-skills --skill speckit.diffgit clone --depth 1 https://github.com/wedabro/bro-skillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/wedabro/bro-skills/speckit.diff)<a href="https://agentmods.dev/skills/wedabro/bro-skills/speckit.diff"><img src="https://agentmods.dev/badge/skills/wedabro/bro-skills/speckit.diff.svg" alt="Measured on agentmods" height="20"></a>What 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 5.1 | $0.00014 | $0.00209 |
| Opus 5 | $0.00007 | $0.00105 |
| Sonnet 5 | $0.00003 | $0.00042 |
| Haiku 4.5 | $0.00001 | $0.00021 |
Grade A, and why
speckit.diff 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 5d 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
🎯 Mission
Compare 2 versions of artifact → highlight changes → evaluate impact.
📥 Input
- 2 files or 2 versions to compare (spec, plan, tasks, code)
📋 Protocol
- Read both versions.
- Compare section-by-section:
- ➕ Added: New Sections/requirements
- ➖ Removed: Sections/requirements are removed
- ✏️ Changed: Sections have changed content
- Impact Analysis: What downstream artifact does each change affect?
- For example: Add fields in spec → need to update plan → need to add tasks
- Output summary table.
📤 Output
- Console: Diff summary table
- File:
.agents/memory/diff-report.md(if needed to save)
🚫 Guard Rails
- Compare and report ONLY — DO NOT arbitrarily edit artifacts.
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.
- 5d ago First seen · 28 lines · 14 tokens per session scan A f715e5fc46bb
speckit.diff is a skill published in the GitHub repository wedabro/bro-skills (2 stars, last pushed 9d ago), licensed MIT. It adds 14 tokens to every session and 209 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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