Agent skill

Delivery Gate

Stop hook that blocks Claude from finishing until quality checks pass.

MITAuto-check passed

Install Delivery Gate

skills CLI

$ npx skills add affaan-m/ECC --skill delivery-gate -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install affaan-m/ECC delivery-gate --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/affaan-m/ECC.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/delivery-gate .claude/skills/delivery-gate && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Paste into Claude Code

Install the "delivery-gate" agent skill from https://github.com/affaan-m/ECC/tree/main/skills/delivery-gate into .claude/skills/delivery-gate/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "delivery-gate", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/affaan-m/ECC/tree/main/skills/delivery-gate

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add affaan-m/ECC --skill delivery-gate -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install affaan-m/ECC delivery-gate --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/affaan-m/ECC.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/delivery-gate .agents/skills/delivery-gate && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "delivery-gate" agent skill from https://github.com/affaan-m/ECC/tree/main/skills/delivery-gate into .agents/skills/delivery-gate/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "delivery-gate", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add affaan-m/ECC --skill delivery-gate -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install affaan-m/ECC delivery-gate --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/affaan-m/ECC.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/delivery-gate .cursor/skills/delivery-gate && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "delivery-gate" agent skill from https://github.com/affaan-m/ECC/tree/main/skills/delivery-gate into .cursor/skills/delivery-gate/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "delivery-gate", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/affaan-m/ECC.git --path skills/delivery-gate

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add affaan-m/ECC --skill delivery-gate -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install affaan-m/ECC delivery-gate --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/affaan-m/ECC.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/delivery-gate .gemini/skills/delivery-gate && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "delivery-gate" agent skill from https://github.com/affaan-m/ECC/tree/main/skills/delivery-gate into .gemini/skills/delivery-gate/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "delivery-gate", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install affaan-m/ECC delivery-gate

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add affaan-m/ECC --skill delivery-gate -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/affaan-m/ECC.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/delivery-gate .github/skills/delivery-gate && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "delivery-gate" agent skill from https://github.com/affaan-m/ECC/tree/main/skills/delivery-gate into .github/skills/delivery-gate/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "delivery-gate", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add affaan-m/ECC --skill delivery-gate -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install affaan-m/ECC delivery-gate --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/affaan-m/ECC.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/delivery-gate .opencode/skills/delivery-gate && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "delivery-gate" agent skill from https://github.com/affaan-m/ECC/tree/main/skills/delivery-gate into .opencode/skills/delivery-gate/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "delivery-gate", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: delivery-gate
GitHub stars: 276k
Token cost: ~1.3k tokens
SKILL.md length: 464 words
Files: 2
Skills in repo: 683
Repo updated: Oct 10, 2026
First seen: Oct 7, 2026
Licence: MIT

At a glance

Stop hook that blocks Claude from finishing until quality checks pass.

Claude should be mechanically blocked from declaring work finished before quality checks and learning capture actually pass
SKILL.md covers What It Checks, Why, Install and Learning Libraries, plus 6 more sections
Runs Python scripts from its folder

What it does

Delivery Gate is an agent skill from affaan-m/ECC. Stop hook that blocks Claude from finishing until quality checks pass. Detects rationalization patterns (surface text heuristics), stale learning logs (filesystem mtime), and low disk space. Complements self-audit by mechanically enforcing learning capture habits. Use when Claude should be mechanically blocked from declaring work finished before quality checks and learning capture actually pass.

Its SKILL.md is about 1.3k tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files (for example `hooks/quality-gate.py`).

The repository describes itself as: The agent harness performance optimization system. Skills, instincts, memory, security, and research-first development for Claude Code, Codex, Opencode, Cursor and beyond. The licence is MIT.

When your agent uses it

Claude should be mechanically blocked from declaring work finished before quality checks and learning capture actually pass

Example prompts

“/delivery-gate”

Requirements

Python 3

What it can do on your machine

Read from SKILL.md and the folder at commit 4eb71d9. It shows what the files ask for, not the result of running them.

Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Ships script files (Python), which the agent can run.
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Delivery Gate loads about 1.3k tokens when it runs. Until then it costs about 103 tokens; SKILL.md has 464 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~103
When it runs · the whole SKILL.md, loaded when a task matches: ~1.3k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from affaan-m/ECC at commit 4eb71d9, republished under its MIT licence (© affaan-m). 464 words, ~1,266 tokens.

Download SKILL.mdSave it as .claude/skills/delivery-gate/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.

name: delivery-gate
description: Stop hook that blocks Claude from finishing until quality checks pass. Detects rationalization patterns (surface text heuristics), stale learning logs (filesystem mtime), and low disk space. Complements self-audit by mechanically enforcing learning capture habits. Use when Claude should be mechanically blocked from declaring work finished before quality checks and learning capture actually pass.
metadata.version: 1.1.1
metadata.origin: ECC

Delivery Gate — Mechanical Quality Gate for Claude Code

A Stop hook that checks three things before Claude can finish a session, using only deterministic checks — file modification timestamps, disk usage, and regex patterns on the transcript text. No AI inference.

This is distinct from reasoning gates (like self-audit): delivery-gate checks machine-verifiable facts; self-audit checks output quality across four reasoning dimensions. Together they form defense in depth:

delivery-gate: "Was the learning library touched today? Is disk space safe?"
self-audit: "Is the file content correct, complete, and honest?"

This is the same pattern as CI pipeline gates — automated, deterministic checks that verify machine-readable facts rather than trusting self-reported status.

What It Checks

Check	Mechanism	On Hit
Rationalization patterns	Regex on transcript tail	Warning only (never blocks)
Stale learning libraries	mtime on 5 configurable paths	Warning if some stale; Block if >=3 stale OR growth-log stale + complex task
Disk space < 50GB	`shutil.disk_usage`	Warning
Disk space < 15GB	`shutil.disk_usage`	Block (exit 2)

Rationalization detection warns about patterns like "skip tests for now" and "pre-existing bug" — surface signals that thinking may have been cut short. It never blocks on its own, because regex heuristics can false-positive. The blocking conditions are: disk critical, >=3 learning libs stale, OR growth-log specifically stale (all require complex task >=3 edits).

Why

Claude Code's built-in checks cover code quality (build → type → lint → test). But there's a different failure mode: the agent produces working code while the session hygiene was neglected — learning not captured, rationalized shortcuts, disk running out silently.

Over many sessions of "ship and forget," the human hasn't grown. This hook enforces the habit: complex task → must touch learning libraries.

Install

bash

cp quality-gate.py ~/.claude/scripts/

Add to ~/.claude/settings.json:

json

{
  "hooks": {
    "Stop": [{
      "hooks": [{
        "type": "command",
        "command": "python3 ~/.claude/scripts/quality-gate.py",
        "timeout": 5000
      }]
    }]
  }
}

Show full SKILL.md (190 more words)Show less

Learning Libraries

Create these files in your project's memory directory. The hook checks if at least one was updated today:

memory/
├── growth-log/          # Daily learning entries (directory)
├── decisions/log.md     # Decision log
├── output-index.md      # Index of session outputs
├── ratings-tracker.md   # Skill ratings over time
└── tooling_capabilities.md  # Known tools inventory

Customize the LIBS dict to match your own file structure.

Configuration

Edit quality-gate.py:

Variable	Default	Purpose
`RATIONALIZE`	4 patterns	Regex patterns for rationalization detection
`LIBS`	5 libraries	Files/dirs to check for today's updates
`COMPLEX_THRESHOLD`	3	Edit/Write calls to classify as complex
`DISK_WARN_GB`	50	Warn below this
`DISK_CRIT_GB`	15	Block below this

Examples

Simple session — allowed:

edit_count=1 (< 3, not complex) → exit 0

Complex task, learning captured — allowed:

edit_count=5 (complex) → checks LIBS → growth-log updated today → exit 0

Complex task, no learning — BLOCKED:

edit_count=4 (complex) → checks LIBS → all 5 stale → exit 2
stderr: "Blocked: complex task completed but no learning captured today."

Low disk space — BLOCKED:

disk_free=12GB < 15GB critical → exit 2
stderr: "Blocked: disk space at 12GB (threshold: 15GB)."

Limitations

The hook enforces the habit of touching learning libraries, not the quality of what was recorded. If output-index.md is updated but growth-log is skipped, the hook passes (1 of 5 libraries touched). This is by design: mechanical gates check machine-verifiable facts. For content quality verification, pair with self-audit.

Compatibility

Python 3.8+ (uses from __future__ import annotations)
Cross-platform: Windows, macOS, Linux
Zero dependencies beyond stdlib

Quality

This code went through 4 rounds of automated code review (CodeRabbit + Greptile) with 9 real bugs found and fixed.

Files

SKILL.md and 1 other file in skills/delivery-gate of affaan-m/ECC.

SKILL.md
hooks/quality-gate.py

Open the folder on GitHubat commit 4eb71d9

Compare with similar skills

Delivery Gate next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Delivery Gate compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Delivery Gate this skillaffaan-m/ECC	276k	—	~1.3k	Automated safety check: Pass	MIT	yesterday
Block No Verify Hookwshobson/agents	40k	—	~1.9k	Automated safety check: Notes	MIT	6 days ago
Blocking IO Guardbytedance/deer-flow	84k	—	~1.7k	Automated safety check: Pass	MIT	today
Crush Hook Writercharmbracelet/crush	29k	—	~1.8k	Automated safety check: Pass	Custom licence	today
Hook Development for Claude Code Pluginsanthropics/claude-plugins-official	38k	10 repos	~4.1k	Automated safety check: Notes	Apache-2.0	today
Gate Testsvercel/next.js	143k	—	~2.8k	Automated safety check: Pass	MIT	today

Similar skills

Block No Verify Hook
wshobson/agents
Configure a PreToolUse hook to prevent AI agents from skipping git pre-commit hooks with --no-verify and other bypass flags.
40k GitHub stars~1.9k tokensUpdated 6 days ago
Testing & QAAuto-check: notes
Blocking IO Guard
bytedance/deer-flow
Adds a runtime test anchor for backend async code that could block the asyncio event loop, and proves the anchor fails when the blocking call returns.
84k GitHub stars~1.7k tokensUpdated today
DevelopmentAuto-check passed
Crush Hook Writer
charmbracelet/crush
Helps write, debug and configure Crush hooks in crush.json that block, approve or rewrite tool calls before they run.
29k GitHub stars~1.8k tokensUpdated today
Agent WorkflowsAuto-check passed
Hook Development for Claude Code Plugins
anthropics/claude-plugins-official
Official
Explains how to write Claude Code plugin hooks, both prompt-based checks and bash commands, for events such as PreToolUse, Stop and SessionStart.
38k GitHub starsUsed in 10 repos~4.1k tokens
Agent WorkflowsAuto-check: notes
Gate Tests
vercel/next.js
Official
How to use the @gate / @force-gate test directives instead of it.skip or fake-green skip patterns.
143k GitHub stars~2.8k tokensUpdated today
Auto-check passed
Block Kit
openclaw/openclaw
Use proactively for structured or interactive Slack replies, and when asked to author or validate native Slack Block Kit JSON.
392k GitHub stars~624 tokensUpdated today
Auto-check passed

Questions about Delivery Gate

What does Delivery Gate do?

Stop hook that blocks Claude from finishing until quality checks pass. Delivery Gate is an agent skill from affaan-m/ECC. Stop hook that blocks Claude from finishing until quality checks pass.

When should I use Delivery Gate?

Delivery Gate fits situations like: Claude should be mechanically blocked from declaring work finished before quality checks and learning capture actually pass.

How do I install Delivery Gate in Claude Code?

Run `npx skills add affaan-m/ECC --skill delivery-gate -a claude-code`. Or copy the skill folder (skills/delivery-gate in affaan-m/ECC) into .claude/skills/delivery-gate in your project. Claude Code loads it when a task matches its description.

How do I install Delivery Gate in Codex?

Run `npx skills add affaan-m/ECC --skill delivery-gate -a codex`. Or copy the skill folder (skills/delivery-gate in affaan-m/ECC) into .agents/skills/delivery-gate in your project. Codex loads it when a task matches its description.

Can I use Delivery Gate in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add affaan-m/ECC --skill delivery-gate -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/delivery-gate, .gemini/skills/delivery-gate, .github/skills/delivery-gate and .opencode/skills/delivery-gate in your project.

What does Delivery Gate need to run?

Going by SKILL.md and its folder, Delivery Gate needs Python for the scripts in its folder. Our summary lists: Python 3.

Does Delivery Gate access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Delivery Gate safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Delivery Gate use?

Delivery Gate is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Delivery Gate use?

About 1.3k tokens (SKILL.md is roughly 5.1k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Delivery Gate?

Skills that share tags, products or a category with Delivery Gate: Block No Verify Hook (wshobson/agents, 40k stars), Blocking IO Guard (bytedance/deer-flow, 84k stars), Crush Hook Writer (charmbracelet/crush, 29k stars) and Hook Development for Claude Code Plugins (anthropics/claude-plugins-official, 38k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Delivery Gate?

affaan-m (a GitHub user) maintains it in affaan-m/ECC, which has 276,111 GitHub stars. The repository holds 683 skills in this directory. The repository was last updated on October 10, 2026.

Source: affaan-m/ECC on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Install Delivery Gate

Facts

At a glance

What it does

When your agent uses it

Example prompts

Requirements

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Delivery Gate — Mechanical Quality Gate for Claude Code

What It Checks

Why

Install

Learning Libraries

Configuration

Examples

Limitations

Compatibility

Quality

See Also

Files

Compare with similar skills

Similar skills

More from affaan-m/ECC

Questions about Delivery Gate