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 open-horizon-labs/repo-native-alignment --skill dead-codegit clone --depth 1 https://github.com/open-horizon-labs/repo-native-alignmentWrote 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/open-horizon-labs/repo-native-alignment/dead-code)<a href="https://agentmods.dev/skills/open-horizon-labs/repo-native-alignment/dead-code"><img src="https://agentmods.dev/badge/skills/open-horizon-labs/repo-native-alignment/dead-code/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/open-horizon-labs/repo-native-alignment/dead-code"><img src="https://agentmods.dev/badge/skills/open-horizon-labs/repo-native-alignment/dead-code.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 | $0.00031 | $0.02288 |
| Opus 5.5 | $0.00012 | $0.00915 |
| Sonnet 5.5 | $0.00006 | $0.00458 |
| Haiku 4.5 | $0.00003 | $0.00229 |
Grade A, and why
dead-code 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 1mo 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 — 178 lines — stays where its author put it; the contents beside it link to each section on GitHub.
/dead-code
Find public functions that nothing calls (excluding tests). Uses RNA's graph to identify candidates — not a compiler, so results are heuristic. False positives exist (framework callbacks, trait impls, FFI exports, CLI dispatch targets).
Arguments
$ARGUMENTS should be: [scope]
- No arguments: scan the whole repo
- File path:
src/service.rs— scan one file - Directory:
src/extract/— scan a subtree - Subsystem:
subsystem:code— scan an RNA-detected subsystem
Examples:
/dead-code/dead-code src/embed.rs/dead-code src/graph/
Procedure
Step 0: Verify capability readiness (precondition)
This skill requires repo-wide LSP call/reference coverage. Scoped coverage from changed-file/root enrichment is useful for review-readiness, but not enough for global dead-code: without repo-wide edges, every function can look dead and every result is a false positive. Verify readiness through RNA's MCP-visible output before doing anything else; do not rely on log scraping.
Self-check (run this first):
search(query="capability", verbose=true, limit=1)
verbose=true includes the Capability readiness section for any query; the query just gives the search tool a harmless term to return alongside the readiness footer.
Read the Capability readiness section:
extracted graph / exact searchmust bereadyfor basic symbol listing.LSP call/reference coveragemust bereadywith a non-zero edge count and repo-wide coverage.global dead-code prerequisitesmust beready(this is the workflow gate that aggregates the repo-wide LSP coverage requirement for dead-code analysis).
If global dead-code prerequisites is running, partial/degraded, failed, unavailable, or stale, abort and report the precondition failure rather than emitting candidates. If RNA reports scoped/root/changed-file LSP coverage, explain that the coverage may support review-readiness but not global dead-code. Common causes:
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.
- 1mo ago First seen · 178 lines · 31 tokens per session scan A 1104989e73f4
dead-code is a skill published in the GitHub repository open-horizon-labs/repo-native-alignment (6 stars, last pushed 1mo ago), licensed MIT. It adds 31 tokens to every session and 2,288 once invoked, about $0.0001 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 2026-08-31.
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