Phase Spec Execution

Q: What is a Claude Code skill and how does the Phase Spec Execution skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Phase Spec Execution is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the General category. Learn more at https://claudskills.com/learn/what-is-skill-md/.

Category: General · Sub-category: operations · Last updated: 2026-06-07

Execute large tasks through explicit phases with acceptance criteria, required commands, and state updates. Use when work is too large for one implementation pass but too important to leave as a vague checklist. Keep phases falsifiable, end-to-end, and small enough that each one can be verified honestly before moving on.

About this skill (catalog notes)

Phase Spec Execution is published as a SKILL.md file in this catalog. The SKILL.md is on the shorter side at about 310 words.

Source: abvx.xyz/work/abvx-agent-skills
License: MIT
Original author: markoblogo
Indexed lastmod: 2026-06-07
Catalog position: General · operations
Indexed related skills: 10

How Phase Spec Execution fits the catalog

Phase Spec Execution sits in the General category under the operations sub-topic in the ClaudSkills catalog. There are 10 related skills indexed alongside it; comparing a few before installing usually reveals which fits your workflow best.

These notes are auto-generated from features detected in the SKILL.md file and from this catalog's structure — they aren't part of the source repository.

From the source SKILL.md

Turn a large task into a sequence of falsifiable execution slices instead of one broad blob of work.

What this skill does

Phase Spec Execution is a community-contributed Claude Code skill in the operations sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/phase-spec-execution/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use when work is too large for one implementation pass but too important to leave as a vague checklist. Keep phases falsifiable, end-to-end, and small enough that each one can be verified honestly before moving on.

Who uses this skill

The Phase Spec Execution Claude Code skill is built for Claude Code users and developers across all disciplines looking for general-purpose AI assistance. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 93,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/phase-spec-execution
curl -L https://claudskills.com/skills/phase-spec-execution/SKILL.md \
  -o ~/.claude/skills/phase-spec-execution/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/phase-spec-execution/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/phase-spec-execution/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\phase-spec-execution\SKILL.md on Windows. See the full install guide for step-by-step instructions.

📱 Install from your phone or desktop Telegram

Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Frequently asked questions

How do I install the Phase Spec Execution Claude Code skill?

Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/phase-spec-execution/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.

What does the Phase Spec Execution skill do?

Is this skill free to install?

Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.

When should I use the Phase Spec Execution skill?

Use Phase Spec Execution when your Claude Code task falls under the General category — specifically in the operations area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Phase Spec Execution" or describe the task and let Claude pick). Browse related skills at /category/general/.

What is a Claude Code skill and how does the Phase Spec Execution skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Phase Spec Execution is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the General category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

Source: https://github.com/markoblogo/abvx-agent-skills/blob/HEAD/skills/phase-spec-execution/SKILL.md
License: MIT
Author: markoblogo
Website: https://abvx.xyz/work/abvx-agent-skills

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA

markoblogo. (2026). Phase Spec Execution [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/phase-spec-execution/

BibTeX

@misc{phase-spec-execution-2026,
  author    = {markoblogo},
  title     = {Phase Spec Execution [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/phase-spec-execution/}
}

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