ftd

ftd is a skill for Claude Code, Codex from ericrisco/rsc-harness. It costs 108 tokens per session (1,590 once invoked), scanned A, original, MIT.

A lightweight development workflow for authorised changes, using one feature document to record intent, scope, tasks, evidence, and the next step.

In plain words
What is it for?
Use it to manage ordinary feature work, track verified progress, and branch into code changes when needed.
Why use it?
It provides a durable record for work that may be interrupted without applying the heavier process used for higher-risk changes.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to manage ordinary feature work, track verified progress, and branch into code changes when needed.

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Install with agentmods
npx agentmods add skills/ericrisco/rsc-harness/ftd
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 ericrisco/rsc-harness --skill ftd
Clone the repo
git clone --depth 1 https://github.com/ericrisco/rsc-harness

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 ftd

README.md
[![agentmods](https://agentmods.dev/badge/skills/ericrisco/rsc-harness/ftd/github.svg)](https://agentmods.dev/skills/ericrisco/rsc-harness/ftd)
Your own site
<a href="https://agentmods.dev/skills/ericrisco/rsc-harness/ftd"><img src="https://agentmods.dev/badge/skills/ericrisco/rsc-harness/ftd/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 ftd

Your own site · 80×15
<a href="https://agentmods.dev/skills/ericrisco/rsc-harness/ftd"><img src="https://agentmods.dev/badge/skills/ericrisco/rsc-harness/ftd.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 108 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,590 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 5.1 $0.00108 $0.01590
Opus 5.5 $0.00043 $0.00636
Sonnet 5.5 $0.00022 $0.00318
Haiku 4.5 $0.00011 $0.00159

Measured 12d ago against content hash a26c53d3b9f0, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

ftd 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 12d 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.

skills/ftd/SKILL.md · 111 lines

How it starts

The opening of the file, as written. The whole thing — 111 lines — stays where its author put it; the contents beside it link to each section on GitHub.

FTD — Fast-Track Development

The lane ordinary work takes. Not a lighter methodology: the same discipline about evidence with none of the coordination the ten-phase chain exists to buy. One document instead of five, written because the work might be interrupted, not because somebody has to approve it first.

You are here because the decisor in ../suggest/SKILL.md ruled that this turn authorises a change and did not select ../sdd/SKILL.md. If it is still a question, you are in the wrong place: go back and answer it.

Why this lane exists

The constitution's seventh principle has said it from the start: «la fricción es proporcional al riesgo. Silencio para lo trivial, ceremonia solo donde el fallo es caro. Un sistema que molesta en el 80% inofensivo acaba apagado, y apagado no protege el 20% que importa.»

The harness spent a long time contradicting it — every request that sounded like building went through ten phases. This lane is that principle finally implemented, not a new idea.

The feature document

One per feature, in the workspace wiki under 02-DOCS/wiki/ftd/<slug>.md. Never inside the code repository: whoever clones it should get code, not somebody else's notes in progress.

It is written before the first change, not after, and it holds exactly this:

---
author: <who asked for it — git user.name>
branch: <the branch the work runs on>
status: in-progress
---
# <feature>

## Intent          — what changes, and why it is worth doing
## Scope           — what is in, and what is explicitly not
## Checklist       — one line per task, each with what would prove it done
## Evidence        — the observed output per completed task
## Next            — the single next step, so an interruption costs nothing

The frontmatter says whose work it is, so «¿qué ha hecho cada uno?» has an answer. You never close it by hand: when the branch lands on the default branch, rsc's post-merge hook sets status: done and replaces Next with where and when it merged (on a closed default branch, via rsc/knowledge).

Read the full file on GitHub · 111 lines

Files

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.

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. 12d ago Changed · +9 lines a26c53d3b9f0
  2. 13d ago Changed · +5 lines · +3 tokens per session 1104ecd5f307
  3. 15d ago Changed · +6 lines 9bbb4fcbc4f9
  4. 16d ago Changed · -3 lines f9c0a6ec1a1f
  5. 1mo ago First seen · 94 lines · 105 tokens per session scan A 7ae21ce2110c

Subscribe to this mod's changes

ftd is a skill published in the GitHub repository ericrisco/rsc-harness (231 stars, last pushed today), licensed MIT. It adds 108 tokens to every session and 1,590 once invoked, about $0.0004 per session on Opus 5.5. 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 2026-09-18.