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/preflight/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/preflight)<a href="https://agentmods.dev/skills/cesarnml/son-of-anton/preflight"><img src="https://agentmods.dev/badge/skills/cesarnml/son-of-anton/preflight/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/preflight"><img src="https://agentmods.dev/badge/skills/cesarnml/son-of-anton/preflight.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 | $0.00064 | $0.01597 |
| Opus 5 | $0.00032 | $0.00798 |
| Sonnet 5 | $0.00013 | $0.00319 |
| Haiku 4.5 | $0.00006 | $0.00160 |
Grade A, and why
soa-preflight 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 12d 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 — 156 lines — stays where its author put it; the contents beside it link to each section on GitHub.
SoA Preflight
Run the template-compliance checklist for a decomposed delivery phase. This is the gate between decompose (plan files written) and execute (orchestrator begins implementation). A phase that fails preflight must be corrected before /soa execute is called.
Trigger
/soa preflight <phase-N> — e.g. /soa preflight phase-06
Also triggered automatically by /soa decompose after files are written and developer approves the breakdown, before surfacing the execute prompt.
What It Checks
Implementation Plan (implementation-plan.md)
Required sections (exact heading text):
## Epic## Product contract## Grill-Me decisions locked## Ticket Order## Ticket Files## Exit Condition## CI Baseline## Review Rules## Explicit Deferrals## Stop Conditions## Phase Closeout
Cross-checks:
- Every filename listed under
## Ticket Filesmust exist on disk in the delivery directory. - Every ticket listed under
## Ticket Ordermust have a corresponding file in## Ticket Files. ## Phase Closeoutmust containRetrospective: requiredorRetrospective: skip.- If
## Epiccontains any line starting withOrigin issue(case-insensitive, ignoring leading whitespace), every such line must match the literal formatOrigin issue: #<N>exactly (capitalO, lowercaseissue, colon, single space,#, digits only, nothing else on the line — one issue per line; a comma-separated single-line form is not supported). The orchestrator's parser (parseOriginIssueNumbersintools/delivery/planning.ts, P21.06) matches this format silently, line by line — a near-miss (Origin Issue #76,Origin issue #76,origin issue: 76, trailing punctuation or prose after the digits) produces no error anywhere; that line just never contributes aCloses #<N>bullet to the final ticket's PR body. Treat any near-miss line as a FAIL, not a warning — this is the one case where wrong-but-plausible input fails the phase silently downstream instead of loudly at decompose time. A phase with multiple correctly-formattedOrigin issuelines is valid — check each line independently, not just the first.
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.
- 12d ago First seen · 156 lines · 64 tokens per session scan A 399062b84226
soa-preflight is a skill published in the GitHub repository cesarnml/son-of-anton (2 stars, last pushed 1mo ago), licensed MIT. It adds 64 tokens to every session and 1,597 once invoked, about $0.0003 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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