test-generate

A command that creates tests for a specified file and runs them. It uses the project's existing test framework and follows nearby tests as examples.

In plain words
What is it for?
It helps cover normal usage, boundary and malformed inputs, and failures involving files, networks, or databases, then checks the generated tests by running them.
Why use it?
It avoids adding an unnecessary test system or writing tests that do not match the project's existing conventions.

Command

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 commands/hamr0/liteagents/test-generate
Clone the repo
git clone --depth 1 https://github.com/hamr0/liteagents
Per session 11 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 740 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 $0.00011 $0.00740
Opus 5 $0.00005 $0.00370
Sonnet 5 $0.00002 $0.00148
Haiku 4.5 $0.00001 $0.00074

Measured 2d ago against content hash e576afc7dbc5, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

test-generate 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.

packages/ampcode/commands/test-generate.md · 68 lines

How it starts

The opening of the file, as written. The whole thing — 68 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Generate tests for $ARGUMENTS, then run them. This is a generate → run → verify loop, not just file generation.

1. Discover

  • Detect the test framework already in use (look for jest.config*, vitest.config*, pytest.ini / pyproject.toml [tool.pytest], Go's _test.go convention, Cargo.toml [dev-dependencies], etc.). Never add a new framework or runner.
  • Skim 1–2 existing test files near the target to mirror style, fixtures, setup/teardown, assertion style, and naming convention.

2. Generate

Cover:

  • Happy path (expected usage)
  • Edges (empty / null / boundary / malformed)
  • Errors (invalid input, IO / network / DB failures)

Match existing patterns:

  • Same framework, same fixture style, same naming convention.
  • Reuse existing setup/teardown helpers; do not add new mock libraries or new test-runner config.
  • Do not add test-only public methods or exports to production code to make a test possible — if the test wants a hook the prod code doesn't expose, stop and ask (test-traps territory).

3. Run

Execute the project's real test command, scoped to just the new tests (-t <name>, --testPathPattern, pytest path/to/test.py, go test ./pkg, etc.). Report:

  • Pass / fail counts.
  • Any failure with the assertion message and file:line.

4. Verify the tests BITE

A test that passes is not the same as a test that exercises the code. For each new test, confirm:

  • It would fail if the function under test returned the wrong value. Mentally swap a broken impl — does the assertion actually catch it?
  • It isn't expect(true).toBe(true), expect(fn).toBeDefined(), or a mock asserting itself.
  • It isn't passing only because the setup masked the real call.

Mark each new test biting or superficial (with reason). Superficial tests count as a failure to ship — either fix or delete.

5. Report

  • Files added / modified.
  • Pass / fail.
  • Biting vs superficial breakdown.
  • What was deliberately not tested, and why (third-party shims, trivial getters/setters, generated code). Documented gaps beat fake coverage.

Read the full file on GitHub · 68 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 · 68 lines · 11 tokens per session scan A e576afc7dbc5

Subscribe to this mod's changes

test-generate is a command published in the GitHub repository hamr0/liteagents (22 stars, last pushed 3d ago), licensed Apache-2.0. It adds 11 tokens to every session and 740 once invoked, about $0.0001 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 2026-08-30.