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 commands/athola/skrills/skill-diffgit clone --depth 1 https://github.com/athola/skrillsWhat 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 | $0.00018 | $0.00245 |
| Opus 5 | $0.00009 | $0.00122 |
| Sonnet 5 | $0.00004 | $0.00049 |
| Haiku 4.5 | $0.00002 | $0.00024 |
Grade A, and why
skill-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 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
Skill Diff
Compare skill versions across CLIs using the skrills MCP server.
Use the mcp__plugin_skrills_skrills__skill-diff tool with:
name: Skill name to compare (e.g., "commit", "review-pr")context_lines: Number of context lines around differences (default: 3)
Parse $ARGUMENTS for:
- First positional argument: Skill name (required)
--context <n>or-C <n>: Context lines to show
Report comparison results including:
- Which CLIs have the skill
- Unified diff between versions
- Frontmatter differences
- Token count differences
- Whether versions are identical
Handle errors:
- If skill name missing: Prompt for skill name
- If skill not found in any CLI: Report and suggest search command
- If skill exists in only one CLI: Report single-source state
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 · 30 lines · 18 tokens per session scan A 69795bcbf231
skill-diff is a command published in the GitHub repository athola/skrills (69 stars, last pushed 2mo ago), licensed MIT. It adds 18 tokens to every session and 245 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 2026-08-30.
Other commands, from other repositories
spawn
Spawn a worker agent session in a registered project. The session runs the chosen agent in a fresh git worktree. Register the project first with ao project add.
send
Send a message to a running agent session. Use this to correct or direct a live agent mid-stream without killing and respawning it.
orchestrator
Command "orchestrator" from Untrivial-ai/agent-orchestrator, covering ao orchestrator, syntax, subcommands, ao orchestrator ls and examples.
browser
Inspect and control the current AO session's target-isolated browser. The desktop app must be open. The agent and user share the same live page, cookies, navigation state, and WebContentsView; the runtime remains usable while the Browser panel is hidden. Tabs in this worker share an ephemeral browser profile, while…
project
Manage projects: register repos, inspect, configure per-project settings, and remove.
ox-session-review
Command "ox-session-review" from sageox/ox, covering failure-mode watch-list (read first), from the ledger root. should print 0, phase 1 — scan & score (read-only), quality buckets (first match wins) and removal candidates.