agentic-tdd

agentic-tdd is a skill for Claude Code, Codex from reticlehq/reticle. It costs 95 tokens per session (1,204 once invoked), scanned A, original, no licence file.

A test-driven development (TDD) method for user-facing features that unit tests cannot check. It writes the expected result against the running application before the implementation.

In plain words
What is it for?
Use it to build UI or full-stack features by declaring the expected behaviour, seeing it fail, implementing the change, and checking that it passes.
Why use it?
It helps catch problems that only appear when the whole interface or application is running. The failing expectation shows what needs to be built before the code is written.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing.

Good fit Use it to build UI or full-stack features by declaring the expected behaviour, seeing it fail, implementing the change, and checking that it passes.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/reticlehq/reticle/agentic-tdd
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.

Any agent
npx skills add reticlehq/reticle --skill agentic-tdd
Clone the repo
git clone --depth 1 https://github.com/reticlehq/reticle

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for agentic-tdd

README.md
[![agentmods](https://agentmods.dev/badge/skills/reticlehq/reticle/agentic-tdd/github.svg)](https://agentmods.dev/skills/reticlehq/reticle/agentic-tdd)
Your own site
<a href="https://agentmods.dev/skills/reticlehq/reticle/agentic-tdd"><img src="https://agentmods.dev/badge/skills/reticlehq/reticle/agentic-tdd/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.

agentmods 80×15 button for agentic-tdd

Your own site · 80×15
<a href="https://agentmods.dev/skills/reticlehq/reticle/agentic-tdd"><img src="https://agentmods.dev/badge/skills/reticlehq/reticle/agentic-tdd.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 95 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,204 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown 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 5.1 $0.00095 $0.01204
Opus 5.5 $0.00038 $0.00482
Sonnet 5.5 $0.00019 $0.00241
Haiku 4.5 $0.00010 $0.00120

Measured 15d ago against content hash 6adfce7d7af6, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

agentic-tdd 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 15d 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.

Predicate reference: `curl https://docs.reticle.sh/predicates.md`. Everything else: `curl https://docs.reticle.sh/llms.txt`.
skills/agentic-tdd/SKILL.md · 76 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

Read it on GitHub

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. 15d ago Changed 6adfce7d7af6
  2. 17d ago Changed 397ef68121a0
  3. 23d ago Changed 8ebc9ccab2f6
  4. 24d ago Changed 413bb16c7681
  5. 29d ago Changed 94a6c31eb518
  6. 1mo ago Changed c966ef237ec0
  7. 1mo ago Changed 3adb0b3ae500
  8. 1mo ago Changed 6a293aa89b42
  9. 1mo ago Changed 71ac4c290fba
  10. 1mo ago First seen · 76 lines · 95 tokens per session scan A 421e3e971eb3

Subscribe to this mod's changes

agentic-tdd is a skill published in the GitHub repository reticlehq/reticle (1,270 stars, last pushed today), with no licence file. It adds 95 tokens to every session and 1,204 once invoked, about $0.0004 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 2026-08-30.

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