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 skills add larsboes/Axon --skill harness-syncgit clone --depth 1 https://github.com/larsboes/AxonWrote 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/larsboes/axon/harness-sync)<a href="https://agentmods.dev/skills/larsboes/axon/harness-sync"><img src="https://agentmods.dev/badge/skills/larsboes/axon/harness-sync/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/larsboes/axon/harness-sync"><img src="https://agentmods.dev/badge/skills/larsboes/axon/harness-sync.svg" alt="Reviewed on agentmods" width="80" 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 | $0.00182 | $0.01419 |
| Opus 5.5 | $0.00073 | $0.00568 |
| Sonnet 5.5 | $0.00036 | $0.00284 |
| Haiku 4.5 | $0.00018 | $0.00142 |
Grade A, and why
harness-sync 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 2mo 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.
How it starts
The opening of the file, as written. The whole thing — 97 lines — stays where its author put it; the contents beside it link to each section on GitHub.
harness-sync
Axon is the source. Every harness holds a copy or a pointer, and the two drift.
One tool answers all of it: tools/harnesses in the Axon repository. This skill is the judgment
around it — which direction a change should travel, and when the answer is not sync.
The direction rule
Axon Packs ──(sync, routine, one-way, overwrites)──▶ harness
Axon Packs ◀──(promote / accept, manual, human decides)── harness
Sync is the normal move and it is destructive at the destination by design. The reverse moves are manual because an edit made inside a harness is a decision, and a tool that guessed would either lose good work or import junk into the source of truth.
| Situation | Move |
|---|---|
| The Pack changed; the harness is behind | sync |
| A deployed copy was edited in place and the edit is worth keeping | accept |
| A deployed copy was edited in place and the edit is not worth keeping | sync (discards it) |
| A skill exists in a harness, no Pack owns it, and it should be shared | promote |
| A skill exists in a harness and belongs to that harness alone | leave it; it shows as unowned every run, which is the honest state |
Procedure
- [ ] 1. Ask which harnesses are installed
- [ ] 2. Read the matrix
- [ ] 3. Resolve drift before deploying anything
- [ ] 4. Move in one direction at a time
- [ ] 5. Re-read the matrix
1 — Installed, not merely supported. tools/harnesses list. A harness with an adapter is not a
harness on this machine, and deploying to an absent one leaves skills in a directory nothing reads.
Every verb defaults to installed harnesses only; --all-harnesses overrides it and needs a reason.
2 — Read the matrix. tools/harnesses status [<pack>]. One row per Pack skill, one column per
harness: · current, o outdated, D drifted, M missing, blank not deployed. Under it, each
harness lists what sits at its destination that no Pack owns:
| Kind | What it means | What to do |
|---|---|---|
copy |
An ordinary directory nobody claims | A promote candidate. Read it first. |
external |
Carries .git, .graphify_version or similar |
Never promote. Another installer owns it and re-syncs from its own remote; a copy in Axon is a fork that will silently pin it. Record it in upstreams.toml instead. |
symlink |
Points into a product install | Never promote. The target is the install; an upgrade updates it. |
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.
- 2mo ago First seen · 97 lines · 182 tokens per session scan A 9379ba001c7c
harness-sync is a skill published in the GitHub repository larsboes/Axon (1 stars, last pushed 1mo ago), licensed MIT. It adds 182 tokens to every session and 1,419 once invoked, about $0.0007 per session on Opus 5.5. 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 2026-09-08.
harness-sync compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| harness-synclarsboes/Axon | Skill | 1 | 1mo ago | MIT | A | 182 | Claude Code |
| starcat-update-changelogstarcat-app/Starcat | Skill | 215 | today | MIT | A | 98 | Claude Code, Codex |
| starcat-releasestarcat-app/Starcat | Skill | 215 | today | MIT | A | 100 | Codex |
| github-issue-lifecyclestarcat-app/Starcat | Skill | 215 | today | MIT | A | 75 | Codex |
| starcat-cli-releasestarcat-app/Starcat | Skill | 215 | today | MIT | A | 85 | Codex |
| github-pr-fixholon-run/holon | Skill | 194 | today | Apache-2.0 | A | 25 | Claude Code, Codex |
| ghxholon-run/holon | Skill | 194 | today | Apache-2.0 | A | 22 | Claude Code, Codex |