Getting it into your agent
It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.
git clone --depth 1 https://github.com/existential-birds/beaglenpx agentmods add skills/existential-birds/beagle/gen-test-planWrote 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/existential-birds/beagle/gen-test-plan)<a href="https://agentmods.dev/skills/existential-birds/beagle/gen-test-plan"><img src="https://agentmods.dev/badge/skills/existential-birds/beagle/gen-test-plan/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/existential-birds/beagle/gen-test-plan"><img src="https://agentmods.dev/badge/skills/existential-birds/beagle/gen-test-plan.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 | $0.00025 | $0.04302 |
| Opus 5.5 | $0.00010 | $0.01721 |
| Sonnet 5.5 | $0.00005 | $0.00860 |
| Haiku 4.5 | $0.00003 | $0.00430 |
Grade A, and why
gen-test-plan scanned grade A with 1 finding 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
- Start a server and hit it with curl How it starts
The opening of the file, as written. The whole thing — 378 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Generate Test Plan
Analyze the repository's tech stack, branch changes vs default, and generate an executable YAML test plan focused on user-facing impact.
This is an E2E test plan — not an automated test wrapper. The generated plan will be executed by an autonomous agent acting exactly as a human QA tester would: launching real binaries, hitting real endpoints, interacting with real databases, and verifying real observable behavior.
Critical Rule: No Automated Test Duplication
NEVER generate test steps that re-run the project's existing automated test suite. This means:
- No
cargo test,pytest,npm test,go test,mix test, or equivalent commands as test steps - No wrapping unit/integration test modules in a test case
- No "run the tests and check they pass" — that's CI's job, not QA's
If you find yourself writing a test step that invokes the project's test runner, stop and rethink. Ask: "What would a human tester do to verify this feature works?" The answer is never "run the unit tests."
What E2E test steps look like:
- Build the binary and run it with real arguments, check stdout/stderr/exit code
- Start a server and hit it with curl
- Run a CLI command that writes to a real database, then query the database to verify
- Launch the TUI and verify it renders (via screenshot or process lifecycle)
- Chain multiple commands that exercise a full user workflow end-to-end
Hard gates
Complete these in order. Do not advance to the next gate until its Pass condition is met (each pass should leave retrievable evidence: pasted command output, a written list, or the generated file on disk). Scheduling: Gate 1 before Step 2; Gate 2 before Step 5; Gate 3 before Step 7; Gates 4–5 during Step 8 (after the Step 7 summary).
- Diff and base pinned (after Step 1) — Resolve the base branch from
--basewhen provided, otherwise use the repo default (mainormasterper Step 1). CompareHEADto$(git merge-base HEAD origin/<base_branch>)(or equivalent if the remote ref differs). Pass: You recordcurrent_branch,base_branch, the merge-base SHA or range used, andchanged_filesfromgit diff --name-only <merge-base>..HEAD(empty list allowed if you paste or quote that output and state “no file changes vs base”).
What ships with it
2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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 · 378 lines · 25 tokens per session scan A e8ebe66d0c6c
gen-test-plan is a skill published in the GitHub repository existential-birds/beagle (82 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 25 tokens to every session and 4,302 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-16.
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