Getting it into your agent
This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.
/plugin marketplace add sequenzia/agent-alchemy/plugin install agent-alchemy-tdd-toolsWrote 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/sequenzia/agent-alchemy/execute-tdd-tasks)<a href="https://agentmods.dev/skills/sequenzia/agent-alchemy/execute-tdd-tasks"><img src="https://agentmods.dev/badge/skills/sequenzia/agent-alchemy/execute-tdd-tasks.svg" alt="Measured on agentmods" 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 | $0.00093 | $0.07942 |
| Opus 5 | $0.00046 | $0.03971 |
| Sonnet 5 | $0.00019 | $0.01588 |
| Haiku 4.5 | $0.00009 | $0.00794 |
Grade A, and why
execute-tdd-tasks 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 4d 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 — 670 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Execute TDD Tasks Skill
This skill orchestrates autonomous execution of TDD task pairs generated by /create-tdd-tasks. It is the TDD counterpart to the standard execute-tasks skill, reusing its session management, wave infrastructure, and execution context sharing while adding TDD-specific agent routing, RED-GREEN-REFACTOR verification, and per-task compliance reporting.
The key difference from standard execute-tasks: this skill routes TDD tasks to the tdd-executor agent (from tdd-tools) which runs a 6-phase TDD workflow, while routing non-TDD tasks to the standard task-executor agent. It verifies TDD compliance (RED verified, GREEN verified, refactored) per task pair and reports aggregate results.
CRITICAL: Complete ALL 9 steps. The workflow is not complete until Step 9: Update CLAUDE.md is evaluated. After completing each step, immediately proceed to the next step without waiting for user prompts (except Step 4 which requires user confirmation).
Plugin Context
This skill is part of the tdd-tools plugin and uses agents from the same plugin:
- tdd-executor agent (Opus) -- 6-phase TDD workflow per task
- test-writer agent (Sonnet) -- parallel test generation (used by tdd-executor internally)
For non-TDD tasks, this skill routes to the task-executor agent from sdd-tools (soft cross-plugin dependency). Since TDD tasks are always generated from SDD tasks via /create-tasks, the sdd-tools plugin is expected to be installed when this skill runs.
Core Principles
1. TDD Compliance First
Every TDD task pair must complete the RED-GREEN-REFACTOR cycle:
- RED: Tests are written and verified to fail before any implementation exists
- GREEN: Implementation is written that makes all tests pass with zero regressions
- REFACTOR: Code is cleaned up while keeping all tests green
2. Strategic Parallelism
Maximize execution throughput without violating TDD sequencing:
- PARALLEL: Multiple test-writing tasks (RED phase) run simultaneously across features
- SEQUENTIAL: Within a single TDD pair, RED must complete before GREEN can start (enforced by dependencies)
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.
- 4d ago First seen · 670 lines · 93 tokens per session scan A f30bd0655823
execute-tdd-tasks is a skill published in the GitHub repository sequenzia/agent-alchemy (44 stars, last pushed 3mo ago), licensed MIT. It adds 93 tokens to every session and 7,942 once invoked, about $0.0005 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 2026-09-03.
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