Borrowing it
Nothing to install: this file belongs to cesarnml/son-of-anton. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/cesarnml/son-of-anton/main/.agents/skills/soa/SKILL.mdgit clone --depth 1 https://github.com/cesarnml/son-of-antonWrote 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/cesarnml/son-of-anton/soa)<a href="https://agentmods.dev/skills/cesarnml/son-of-anton/soa"><img src="https://agentmods.dev/badge/skills/cesarnml/son-of-anton/soa/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/cesarnml/son-of-anton/soa"><img src="https://agentmods.dev/badge/skills/cesarnml/son-of-anton/soa.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 | $0.00104 | $0.03641 |
| Opus 5 | $0.00052 | $0.01820 |
| Sonnet 5 | $0.00021 | $0.00728 |
| Haiku 4.5 | $0.00010 | $0.00364 |
Grade A, and why
soa 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 10d 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 — 310 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Son-of-Anton Skill
Manages son-of-anton installation, updates, and the full delivery lifecycle.
Public slash-command entrypoint: /soa.
Commands
Dispatch on the first word of $ARGUMENTS.
install
Trigger: /soa install
Add son-of-anton to the current repo for the first time:
git subtree add --prefix .son-of-anton https://github.com/cesarnml/son-of-anton.git main --squash
bash .son-of-anton/scripts/soa-sync.sh
If .son-of-anton already exists, tell the user to use update instead.
soa-sync.sh wires the Claude Code adapter as /soa plus soa-* helper
skills. The prefixed helper names are intentional so existing user skills named
grill-me, pr-review, enter-worktree, etc. are not shadowed.
update
Trigger: /soa update
Pull the latest changes from son-of-anton in consumer repos, then re-sync skill symlinks.
If .son-of-anton/scripts/soa-update.sh exists, run:
bash .son-of-anton/scripts/soa-update.sh
Otherwise run the manual recipe (legacy consumers before this script shipped):
git fetch https://github.com/cesarnml/son-of-anton.git main
UPSTREAM_SHA="$(git rev-parse FETCH_HEAD)"
git subtree merge --prefix .son-of-anton "$UPSTREAM_SHA" --squash
bash .son-of-anton/scripts/soa-sync.sh
UPSTREAM_HASH="$(git show "$UPSTREAM_SHA":docs/template/delivery/adversarial-review-template.md | git hash-object --stdin)"
LOCAL_HASH="$(git hash-object .son-of-anton/docs/template/delivery/adversarial-review-template.md)"
test "$UPSTREAM_HASH" = "$LOCAL_HASH"
Fetch upstream first, capture UPSTREAM_SHA, and merge that commit — not plain
main (which can resolve through the consumer repo's local branch history) and
not bare FETCH_HEAD after later git commands may have moved it.
Path mapping for verification: upstream files live at docs/... in the
Son-of-Anton repo; in consumer repos the same content is at
.son-of-anton/docs/....
Those hashes must match. If they do not, report the update as failed and do not claim the repo is current.
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.
- 10d ago First seen · 310 lines · 104 tokens per session scan A ca1da898db0e
soa is a skill published in the GitHub repository cesarnml/son-of-anton (2 stars, last pushed 1mo ago), licensed MIT. It adds 104 tokens to every session and 3,641 once invoked, about $0.0005 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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