beacon

A dependency health and update workflow for a software project. Dependencies are external packages the project relies on; this workflow checks them and evaluates proposed updates through the Beacon compatibility service.

In plain words
What is it for?
Use it to review tracked Dependabot proposals, inspect the project’s current package stack, and propose or apply dependency updates. Automatic runs apply only the updates judged safe.
Why use it?
It helps separate updates that are likely safe from updates that may break the project. It also verifies that the service is connected to the correct repository before checking or changing anything.

Skill for Claude CodeCodex

Install

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.

agentmods
npx agentmods add skills/fo0/clawstash/beacon
Any agent
npx skills add fo0/clawstash --skill beacon
Clone the repo
git clone --depth 1 https://github.com/fo0/clawstash

Made for: Claude Code, Codex.

Per session 0 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,211 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5 $0.00000 $0.01211
Opus 5 $0.00000 $0.00606
Sonnet 5 $0.00000 $0.00242
Haiku 4.5 $0.00000 $0.00121

Measured 2d ago against content hash 46f5e84ffb20, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

beacon 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.

.claude/skills/beacon/SKILL.md · 85 lines

How it starts

The opening of the file, as written. The whole thing — 85 lines — stays where its author put it; the contents beside it link to each section on GitHub.

beacon — check the stack, propose updates, apply only what is safe

Goal: use the beacon MCP tools (compat_*) to (1) pick up the Dependabot proposals beacon already tracks, (2) check THIS project’s current stack, (3) propose dependency updates with beacon’s verdicts attached, and (4) apply them — all of them only when the user picked them; ONLY the safe subset when running autonomously.

1 · Verify identity (every run)

  • Call compat_whoami and confirm it agrees with this repo ("fo0/clawstash", i.e. git remote get-url origin). Exactly two results are OK:
    • project: "fo0/clawstash" — a token bound to THIS project; or
    • declares_project: true — the shared master/onboarding token, bound to no project: then every call below MUST carry project:"fo0/clawstash" (repo: on report/observe), which is what attributes the run. This skill already passes it everywhere.
  • Any other project → STOP and tell the user to re-onboard via beacon’s /onboard page; never write under another project’s token.

2 · Start from tracked proposals (GitHub-connected projects)

  • Call compat_proposals with project:"fo0/clawstash": the open Dependabot PRs beacon tracks for this repo, each with a pre-computed verdict, reasons, and the PR link. Skip this step when the tool is missing or the response says github.connected is false.
  • Treat every open proposal as an update candidate for step 4 — prepared, not pre-approved: beacon’s verdict stays a veto, and the compat_plan validation below still applies.
  • Never merge or close the Dependabot PR yourself. Apply an accepted bump through this repo’s own branch/PR flow (steps 5–6) — Dependabot resolves its PR once the bump lands — and record the outcome with compat_decide either way.

3 · Check the current stack

  • Run compat_check with project:"fo0/clawstash" and the lock-exact stack (prefer the lockfile, e.g. package-lock.json; fall back to the manifest).
  • Read: summary, flagged pairs in results, derived peer/advisory findings, and recommendations — beacon’s verified counter-proposals for flagged pairs.

Read the full file on GitHub · 85 lines

Changes

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.

  1. 2d ago First seen · 85 lines · 0 tokens per session scan A 46f5e84ffb20

Subscribe to this mod's changes

beacon is a skill published in the GitHub repository fo0/clawstash (1 stars, last pushed 2d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 1,211 tokens. 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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