intent-from-spec

intent-from-spec is a skill for Claude Code from ijust/intent-planner. It costs 78 tokens per session (3,640 once invoked), scanned A, original, MIT.

A read-only tool that reads a natural-language specification, such as a product requirements document, issue, notes, or voice transcript, and extracts possible goals, requirements, constraints, and unanswered questions.

In plain words
What is it for?
Use it to prepare intent-planning input from written specs, scribbles, or transcripts, including technical and security requirements.
Why use it?
It turns incomplete or informal descriptions into a structured list while clearly separating confirmed decisions from assumptions. It also exposes details the original text leaves unstated.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

Good fit Use it to prepare intent-planning input from written specs, scribbles, or transcripts, including technical and security requirements.

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Install with agentmods
npx agentmods add skills/ijust/intent-planner/intent-from-spec
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 ijust/intent-planner --skill intent-from-spec
Clone the repo
git clone --depth 1 https://github.com/ijust/intent-planner

Made for: Claude Code.

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 intent-from-spec

README.md
[![agentmods](https://agentmods.dev/badge/skills/ijust/intent-planner/intent-from-spec/github.svg)](https://agentmods.dev/skills/ijust/intent-planner/intent-from-spec)
Your own site
<a href="https://agentmods.dev/skills/ijust/intent-planner/intent-from-spec"><img src="https://agentmods.dev/badge/skills/ijust/intent-planner/intent-from-spec/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 intent-from-spec

Your own site · 80×15
<a href="https://agentmods.dev/skills/ijust/intent-planner/intent-from-spec"><img src="https://agentmods.dev/badge/skills/ijust/intent-planner/intent-from-spec.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 78 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,640 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 $0.00078 $0.03640
Opus 5.5 $0.00031 $0.01456
Sonnet 5.5 $0.00016 $0.00728
Haiku 4.5 $0.00008 $0.00364

Measured 2mo ago against content hash dd940a04bf47, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

intent-from-spec 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 2mo 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.

templates/en/claude/skills/intent-from-spec/SKILL.md · 74 lines

How it starts

The opening of the file, as written. The whole thing — 74 lines — stays where its author put it; the contents beside it link to each section on GitHub.

intent-from-spec Skill

Core Mission

  • Success Criteria (success if achieved; the extract / check / sort / recap procedure detail is consolidated into Execution Steps, and only the outcomes are declared here):
    • Reads the natural-language text (a spec or fragmentary notes) read-only and extracts intent candidates for purpose, outcomes, capabilities, invariants, constraints, anti-direction, and implicit assumptions, marking them all as Assumptions (inferred intent) and never mixing them with canonical (confirmed intent) (Step 1–2. R1.1 / R1.2)
    • When the input is fragmentary notes / scribbles / a voice transcript, bundles the fragments by topic (clustering) and sorts them into "decided / undecided" before the 7-category extraction, presenting every bundle and mark with the inferred marker (without over-rewriting the person's words). For organized-document input this pre-stage does not trigger and the existing output structure is unchanged (C49, DR113)
    • Limits input to that spec text and does not use source code, execution traces, or test results as extraction input (R1.4). Picks up the spec's technical / security requirements without dropping them as Compass Invariants candidates, limiting their destination to Invariants (reflection into tech.md / design delegated downstream. R1.5 / R1.6)
    • When no spec text is provided as input, performs no extraction, asks the user for the spec to ingest, and stops (fail-fast. R1.3)
    • Reads the existing rulers (the inspection catalog in validate-checks.md and the common-core slots in decision-slots.md) against the spec and enumerates the unfilled items as gaps, showing in an observable form which category / slot each is the silence of, and presenting it as a hypothesis rather than a confirmed defect (R2.1 / R2.2 / R2.3). Does not stop processing while presenting; limits to warnings / awareness (same stance as drift-watch. R2.4)
    • Qualitatively sorts the extractions / gaps by load-bearing, presenting high distinctly from low. The judgment merely reads and copies the "front-load / defer door" column in decision-slots.md, and holds no mathematical solver, numeric score, or threshold (R3.1 / R3.2 / R3.3)
    • Summarizes "what was checked and what was left unfilled" as an omission recap, prompting reconfirmation (R4.1)
    • Treats only approved items as candidates for canonical promotion, retains unapproved items as Assumptions without discarding them, performs no auto-reflection, and delegates promotion to the user's manual copy (R4.2 / R4.3 / R4.4)
    • Limits output to derived artifacts under .intent/spec-ingest/, and never modifies any canonical .intent/*.md, application code, or the input spec (read-only. R5.2). Follows the intent-* naming convention and does not modify external spec tools or the kiro-* development environment (R5.6)

Read the full file on GitHub · 74 lines

Files

What ships with it

4 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. 2mo ago First seen · 74 lines · 78 tokens per session scan A dd940a04bf47

Subscribe to this mod's changes

intent-from-spec is a skill published in the GitHub repository ijust/intent-planner (5 stars, last pushed 1mo ago), licensed MIT. It adds 78 tokens to every session and 3,640 once invoked, about $0.0003 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 2026-08-31.

Related

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