speckit.implement

A command that implements a software feature from its written specification and task list. It first checks the project’s prerequisites and reports the status of requirement checklists.

In plain words
What is it for?
Use it in projects that use the Specify workflow to inspect feature files, review checklists, and implement the listed tasks.
Why use it?
It helps turn an agreed feature description into code while exposing unfinished requirement checks before implementation begins.

Command for Cursor

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/ivangrynenko/cursorrules/speckit.implement
Clone the repo
git clone --depth 1 https://github.com/ivangrynenko/cursorrules

Made for: Cursor.

Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,625 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin 78% copy Near-identical to another mod 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 $0.00000 $0.01625
Opus 5 $0.00000 $0.00813
Sonnet 5 $0.00000 $0.00325
Haiku 4.5 $0.00000 $0.00162

Measured yesterday against content hash 905a5caacf96, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

speckit.implement 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 yesterday.

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.

Origin

This is a copy

78% identical to speckit.implement — 68 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.cursor/commands/speckit.implement.md · 119 lines

How it starts

The opening of the file, as written. The whole thing — 119 lines — stays where its author put it; the contents beside it link to each section on GitHub.

User Input

Use the user-provided arguments (if any) as contextual input

You MUST consider the user input before proceeding (if not empty).

Outline

  1. Run .specify/scripts/bash/check-prerequisites.sh --json --require-tasks --include-tasks from repo root and parse FEATURE_DIR and AVAILABLE_DOCS list. All paths must be absolute. For single quotes in args like "I'm Groot", use escape syntax: e.g 'I'''m Groot' (or double-quote if possible: "I'm Groot").

  2. Check checklists status (if FEATURE_DIR/checklists/ exists):

    • Scan all checklist files in the checklists/ directory

    • For each checklist, count:

      • Total items: All lines matching - [ ] or - [X] or - [x]
      • Completed items: Lines matching - [X] or - [x]
      • Incomplete items: Lines matching - [ ]
    • Create a status table:

      | Checklist | Total | Completed | Incomplete | Status |
      |-----------|-------|-----------|------------|--------|
      | ux.md     | 12    | 12        | 0          | ✓ PASS |
      | test.md   | 8     | 5         | 3          | ✗ FAIL |
      | security.md | 6   | 6         | 0          | ✓ PASS |
      
    • Calculate overall status:

      • PASS: All checklists have 0 incomplete items
      • FAIL: One or more checklists have incomplete items
    • If any checklist is incomplete:

      • Display the table with incomplete item counts
      • STOP and ask: "Some checklists are incomplete. Do you want to proceed with implementation anyway? (yes/no)"
      • Wait for user response before continuing
      • If user says "no" or "wait" or "stop", halt execution
      • If user says "yes" or "proceed" or "continue", proceed to step 3
    • If all checklists are complete:

      • Display the table showing all checklists passed
      • Automatically proceed to step 3
  3. Load and analyze the implementation context:

    • REQUIRED: Read tasks.md for the complete task list and execution plan
    • REQUIRED: Read plan.md for tech stack, architecture, and file structure
    • IF EXISTS: Read data-model.md for entities and relationships
    • IF EXISTS: Read contracts/ for API specifications and test requirements
    • IF EXISTS: Read research.md for technical decisions and constraints
    • IF EXISTS: Read quickstart.md for integration scenarios

Read the full file on GitHub · 119 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. yesterday First seen · 119 lines · 0 tokens per session scan A 905a5caacf96

Subscribe to this mod's changes

speckit.implement is a command published in the GitHub repository ivangrynenko/cursorrules (87 stars, last pushed 10mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 1,625 tokens. A static security scan graded it A with 0 findings. It is 78% identical to speckit.implement, differing in 68 lines, and is treated as a copy.