principle-migrate-callers-then-delete-legacy-apis

michael-denyer/pstack-claude Coding & code review

principle-migrate-callers-then-delete-legacy-apis is a skill in michael-denyer/pstack-claude, last changed 15 Oct 2026. It is instructions only: no scripts, no named hosts and no pre-approved tools.

From the author

Apply when introducing a new internal API while old callers still exist. Migrate callers and delete the old API in the same wave instead of preserving compatibility layers.

What it can touch

Instructions only

It is instructions only: no scripts, no named hosts and no pre-approved tools.

How much a skill can do, not whether it is risky.

Pattern check

Nothing flagged

That isn't proof the skill is harmless.

Commit 513c088 · 3 Nov 2026

How the check works

Pattern check: nothing flagged

That isn't proof the skill is harmless.

Install

Each tab says whether it installs commit 513c088, the one we checked, or the latest version.

OpenCode also looks in .agents/skills/ and ~/.agents/skills/, so use the Any agent steps.

Goose also looks in .agents/skills/ and ~/.agents/skills/, so use the Any agent steps.

Windsurf (Devin Desktop) also looks in .agents/skills/ and ~/.agents/skills/, so use the Any agent steps.

Zed also looks in .agents/skills/ and ~/.agents/skills/, so use the Any agent steps.

Roo Code also looks in .agents/skills/ and ~/.agents/skills/, so use the Any agent steps.

Factory Droid also looks in .agents/skills/ and ~/.agents/skills/, so use the Any agent steps.

Junie also looks in .agents/skills/ and ~/.agents/skills/, so use the Any agent steps.

Amp also looks in .agents/skills/ and ~/.agents/skills/, so use the Any agent steps.

No install command here reaches Kiro. Copy the skill's folder into .kiro/skills/ in your project, or ~/.kiro/skills/ for all your projects. michael-denyer/pstack-claude/plugins/pstack/skills/principle-migrate-callers-then-delete-legacy-apis (opens in a new tab)

Antigravity also looks in .agents/skills/, so the Any agent steps reach it with This project. For All projects, see where Antigravity looks.

Cline also looks in .claude/skills/, so the Claude Code steps reach it with This project. For All projects, see where Cline looks.

No tab for your agent? Use Any agent for OpenCode, Goose, Windsurf (Devin Desktop), Zed, Roo Code, Factory Droid, Junie and Amp. With This project, Any agent also reaches Antigravity and Claude Code reaches Cline. Kiro needs the folder copied by hand.

Pinned to commit 513c088, the one we checked.

From your project's root folder:

tmp="$(mktemp -d)" &&git clone -q --depth 1 --filter=blob:none --no-checkout https://github.com/michael-denyer/pstack-claude.git "$tmp" &&git -C "$tmp" fetch -q --depth 1 origin 513c0886b79abb04065293581a4ef7e70049e4f2 &&git -C "$tmp" sparse-checkout set -- plugins/pstack/skills/principle-migrate-callers-then-delete-legacy-apis &&git -C "$tmp" checkout -q 513c0886b79abb04065293581a4ef7e70049e4f2 &&mkdir -p .claude/skills &&mkdir .claude/skills/principle-migrate-callers-then-delete-legacy-apis &&cp -R "$tmp"/plugins/pstack/skills/principle-migrate-callers-then-delete-legacy-apis/. .claude/skills/principle-migrate-callers-then-delete-legacy-apis/ &&rm -rf "$tmp"

If Claude Code was already running and this created the skills folder, run /reload-skills.

Or install the pstack plugin it ships in. Installs the latest version, not the one we checked. Installs everything in the plugin, including any hooks, MCP servers and scripts our check doesn't cover.

claude plugin marketplace add michael-denyer/pstack-claude --scope project &&claude plugin install pstack@pstack-claude --scope project

Claude Code docs

Pinned to commit 513c088, the one we checked.

Skills in the Claude apps belong to your account rather than to a project.

Make principle-migrate-callers-then-delete-legacy-apis.zip, with the skill folder at the top level:

tmp="$(mktemp -d)" &&git clone -q --depth 1 --filter=blob:none --no-checkout https://github.com/michael-denyer/pstack-claude.git "$tmp" &&git -C "$tmp" fetch -q --depth 1 origin 513c0886b79abb04065293581a4ef7e70049e4f2 &&git -C "$tmp" sparse-checkout set -- plugins/pstack/skills/principle-migrate-callers-then-delete-legacy-apis &&git -C "$tmp" checkout -q 513c0886b79abb04065293581a4ef7e70049e4f2 &&out="$(mktemp -d)" &&cp -R "$tmp"/plugins/pstack/skills/principle-migrate-callers-then-delete-legacy-apis "$out"/principle-migrate-callers-then-delete-legacy-apis &&(cd "$out" && zip -qr - principle-migrate-callers-then-delete-legacy-apis) > principle-migrate-callers-then-delete-legacy-apis.zip &&rm -rf "$tmp" "$out"

In Claude, open Customize > Skills, select +, then + Create skill > Upload a skill, and choose principle-migrate-callers-then-delete-legacy-apis.zip.

On Free, Pro and Max plans, turn on Code execution and file creation (Create and edit files in newer settings) under Settings > Capabilities.

Claude apps docs

Pinned to commit 513c088, the one we checked.

From your project's root folder:

tmp="$(mktemp -d)" &&git clone -q --depth 1 --filter=blob:none --no-checkout https://github.com/michael-denyer/pstack-claude.git "$tmp" &&git -C "$tmp" fetch -q --depth 1 origin 513c0886b79abb04065293581a4ef7e70049e4f2 &&git -C "$tmp" sparse-checkout set -- plugins/pstack/skills/principle-migrate-callers-then-delete-legacy-apis &&git -C "$tmp" checkout -q 513c0886b79abb04065293581a4ef7e70049e4f2 &&mkdir -p .agents/skills &&mkdir .agents/skills/principle-migrate-callers-then-delete-legacy-apis &&cp -R "$tmp"/plugins/pstack/skills/principle-migrate-callers-then-delete-legacy-apis/. .agents/skills/principle-migrate-callers-then-delete-legacy-apis/ &&rm -rf "$tmp"

Codex picks up new skills on its own; restart it if this one does not appear.

Codex docs

Pinned to commit 513c088, the one we checked.

From your project's root folder:

tmp="$(mktemp -d)" &&git clone -q --depth 1 --filter=blob:none --no-checkout https://github.com/michael-denyer/pstack-claude.git "$tmp" &&git -C "$tmp" fetch -q --depth 1 origin 513c0886b79abb04065293581a4ef7e70049e4f2 &&git -C "$tmp" sparse-checkout set -- plugins/pstack/skills/principle-migrate-callers-then-delete-legacy-apis &&git -C "$tmp" checkout -q 513c0886b79abb04065293581a4ef7e70049e4f2 &&mkdir -p .cursor/skills &&mkdir .cursor/skills/principle-migrate-callers-then-delete-legacy-apis &&cp -R "$tmp"/plugins/pstack/skills/principle-migrate-callers-then-delete-legacy-apis/. .cursor/skills/principle-migrate-callers-then-delete-legacy-apis/ &&rm -rf "$tmp"

Cursor docs

Pinned to commit 513c088, the one we checked.

From your project's root folder:

tmp="$(mktemp -d)" &&git clone -q --depth 1 --filter=blob:none --no-checkout https://github.com/michael-denyer/pstack-claude.git "$tmp" &&git -C "$tmp" fetch -q --depth 1 origin 513c0886b79abb04065293581a4ef7e70049e4f2 &&git -C "$tmp" sparse-checkout set -- plugins/pstack/skills/principle-migrate-callers-then-delete-legacy-apis &&git -C "$tmp" checkout -q 513c0886b79abb04065293581a4ef7e70049e4f2 &&mkdir -p .github/skills &&mkdir .github/skills/principle-migrate-callers-then-delete-legacy-apis &&cp -R "$tmp"/plugins/pstack/skills/principle-migrate-callers-then-delete-legacy-apis/. .github/skills/principle-migrate-callers-then-delete-legacy-apis/ &&rm -rf "$tmp"

In a running Copilot CLI session, run /skills reload.

Or install it with gh skill, which also installs the commit we checked. Needs GitHub CLI 2.90 or later.

gh skill install michael-denyer/pstack-claude plugins/pstack/skills/principle-migrate-callers-then-delete-legacy-apis/SKILL.md@513c0886b79abb04065293581a4ef7e70049e4f2 --agent github-copilot --scope project

Copilot & VS Code docs

Pinned to commit 513c088, the one we checked.

From your project's root folder:

tmp="$(mktemp -d)" &&git clone -q --depth 1 --filter=blob:none --no-checkout https://github.com/michael-denyer/pstack-claude.git "$tmp" &&git -C "$tmp" fetch -q --depth 1 origin 513c0886b79abb04065293581a4ef7e70049e4f2 &&git -C "$tmp" sparse-checkout set -- plugins/pstack/skills/principle-migrate-callers-then-delete-legacy-apis &&git -C "$tmp" checkout -q 513c0886b79abb04065293581a4ef7e70049e4f2 &&mkdir -p .gemini/skills &&mkdir .gemini/skills/principle-migrate-callers-then-delete-legacy-apis &&cp -R "$tmp"/plugins/pstack/skills/principle-migrate-callers-then-delete-legacy-apis/. .gemini/skills/principle-migrate-callers-then-delete-legacy-apis/ &&rm -rf "$tmp"

In a running session, run /skills reload.

Or use Gemini CLI’s own installer. Installs the latest version, not the one we checked.

gemini skills install https://github.com/michael-denyer/pstack-claude.git --path plugins/pstack/skills/principle-migrate-callers-then-delete-legacy-apis --scope workspace

Gemini CLI docs

Pinned to commit 513c088, the one we checked.

OpenCode, Goose, Windsurf (Devin Desktop), Zed, Roo Code, Factory Droid, Junie, Amp and Antigravity read .agents/skills in a project.

From your project's root folder:

tmp="$(mktemp -d)" &&git clone -q --depth 1 --filter=blob:none --no-checkout https://github.com/michael-denyer/pstack-claude.git "$tmp" &&git -C "$tmp" fetch -q --depth 1 origin 513c0886b79abb04065293581a4ef7e70049e4f2 &&git -C "$tmp" sparse-checkout set -- plugins/pstack/skills/principle-migrate-callers-then-delete-legacy-apis &&git -C "$tmp" checkout -q 513c0886b79abb04065293581a4ef7e70049e4f2 &&mkdir -p .agents/skills &&mkdir .agents/skills/principle-migrate-callers-then-delete-legacy-apis &&cp -R "$tmp"/plugins/pstack/skills/principle-migrate-callers-then-delete-legacy-apis/. .agents/skills/principle-migrate-callers-then-delete-legacy-apis/ &&rm -rf "$tmp"

Or use the skills CLI from skills.sh. Installs the latest version, not the one we checked. The skills CLI reports installs to skills.sh unless you set DISABLE_TELEMETRY=1.

npx skills@1.7.4 add michael-denyer/pstack-claude --skill principle-migrate-callers-then-delete-legacy-apis

Agent Skills docs

Read SKILL.md first

MIT

Licence

3.8k

Repo stars

Folder last changed

Publisher

Files

Checked

3 Nov 2026

plugins/pstack/assets/pstack-icon.png

Logo

The project's logo, named in its Codex plugin manifest

What it can touch

From the files and frontmatter at commit 513c088. This is how much a skill can do, not whether it is risky.

Instructions only

It is instructions only: no scripts, no named hosts and no pre-approved tools.

Pattern check

Pattern check: nothing flagged · commit 513c088 · 3 Nov 2026

We checked every text file in this skill, at commit 513c088 on 3 Nov 2026, against 45 published patterns such as download-and-run commands, hidden text and credential access. We don't run the skill, we don't read the web pages it points to, and we can't judge everything its instructions might lead an agent to do. In published tests, pattern checks like this one missed most malicious skills. Read the skill before you install it — especially anything it asks you to download or run.

How the check works Report an incorrect finding

Format check

Each agent reads SKILL.md a little differently. We check the file against each one's published rules; we don't run the skill in any agent.

Agent Skills specPasses with warnings
The open format from agentskills.io, held to the strictest version of each rule among the agents we check.
- Warning
  Fields outside the spec: user-invocable (read by Claude Code and VS Code). Uploads to the Claude apps and API, and the spec's validator, reject the file; most agents ignore these fields. O1
  Fix: Delete them for a portable skill, or keep them if you only target the agents that read them.
- Note
  There is no license field, so readers can't tell whether they may reuse the skill. O2
  Fix: Add license: with an SPDX name such as MIT or Apache-2.0, or the name of a bundled licence file.
Claude CodePasses
Claude apps & API uploadFails
Uploading to claude.ai or the Claude API, or packaging with Anthropic's script, accepts only the six spec fields and stops on anything else.
- Error
  Upload and packaging fail on fields outside the spec: user-invocable. O1
  Fix: Delete them, and keep your own data under metadata as text values.
OpenAI (Codex & API)Passes with warnings
Codex finds SKILL.md by its exact name and needs a description; OpenAI's Skills API checks the frontmatter against the spec and caps uploads.
- Warning
  Fields outside the spec: user-invocable. Codex ignores them; OpenAI doesn't say whether its upload accepts them. O1
  Fix: Delete them, or move your own data under metadata as text values.
VS Code & CopilotPasses

SKILL.md

Read SKILL.md on GitHub

Files

1 file

Path	Size
SKILL.md (opens in a new tab)	628 B

Copies

These share its SKILL.md or its name and description but not all its files, so we list them separately.

backnotprop/pstack/principle-migrate-callers-then-delete-legacy-apis

More from michael-denyer/pstack-claude

Skill	What it can touch	Pattern check	Licence	Updated
architectSketch types, signatures, and module structure before code, then stay in the loop while implementation fills in. Use for /architect, 'architect this', 'design this', or non-trivial work where jumping to code would lock in the wrong shape. Instructions only Pattern check: Nothing flaggedMITUpdated 30 Oct 2026	Instructions only	Pattern check: Nothing flagged	MIT	30 Oct 2026
arenaSpawn N parallel candidates at the same task, pick a base, graft the strongest parts of the losers into it. Use for /arena, 'arena this', 'throw it in the arena', or when one attempt at a non-trivial artifact would lock in the wrong shape. Instructions only Pattern check: Nothing flaggedMITUpdated 30 Oct 2026	Instructions only	Pattern check: Nothing flagged	MIT	30 Oct 2026
automate-meUse for "automate me", "create/update/refresh my -mode skill", "turn/capture my preferences or working style into a skill", or wanting agents to follow how the user works. Drafts or revises a personal -mode skill via plugin-dev:skill-development + unslop, optionally pulling fresh evidence from recent transcripts. Runs shell commands Pattern check: Nothing flaggedMITUpdated 21 Oct 2026	Runs shell commands	Pattern check: Nothing flagged	MIT	21 Oct 2026
babysitWatch an open PR — fix failing CI, handle the straightforward review comments, and drive it to a mergeable state. Claude Code analog of Cursor's built-in /babysit. Use after opening a PR when the user wants the agent to shepherd it without re-prompting. Runs shell commands Pattern check: Nothing flaggedMITUpdated 20 Oct 2026	Runs shell commands	Pattern check: Nothing flagged	MIT	20 Oct 2026
benchmark-checklistVet a perf measurement (limiter, tuning, limits, errors, repeatability, relevance, and whether the work happened) before you report or act on it. Use when you run a benchmark or report a speedup or regression you measured. Instructions only Pattern check: Nothing flaggedMITUpdated 12 Oct 2026	Instructions only	Pattern check: Nothing flagged	MIT	12 Oct 2026
blast-radiusFind what a change could break somewhere else before it ships, beyond the diff, and prove the one fact it's safe because of by running real code instead of writing it up. Use for 'blast radius of X', 'what could this break', reviewing a small diff you don't trust, or a brief that asserts something about existing code ('make X public', 'X already handles Y') before you design against that assertion. Instructions only Pattern check: Nothing flaggedMITUpdated 8 Oct 2026	Instructions only	Pattern check: Nothing flagged	MIT	8 Oct 2026

All skills in michael-denyer/pstack-claude

Other Coding & code review skills

Same category, most repo stars first.

Skill	What it can touch	Pattern check	Licence	Updated
finishing-a-development-branchUse when implementation is complete, all tests pass, and you need to decide how to integrate the work obra/superpowers Runs shell commands +1 more Pattern check: Nothing flaggedMITUpdated 12 Aug 2026	Runs shell commands Reaches the network	Pattern check: Nothing flagged	MIT	12 Aug 2026
receiving-code-reviewUse when receiving code review feedback, before implementing suggestions, especially if feedback seems unclear or technically questionable - requires technical rigor and verification, not performative agreement or blind implementation obra/superpowers Reaches the network Pattern check: Nothing flaggedMITUpdated 23 Jul 2026	Reaches the network	Pattern check: Nothing flagged	MIT	23 Jul 2026
agent-introspection-debuggingStructured self-debugging workflow for AI agent failures using capture, diagnosis, contained recovery, and introspection reports. Use when an agent run fails and you need a reproducible diagnosis instead of a retry. affaan-m/ECC Instructions only Pattern check: Nothing flaggedMITUpdated 11 Aug 2026	Instructions only	Pattern check: Nothing flagged	MIT	11 Aug 2026
api-connector-builderBuild a new API connector or provider by matching the target repo's existing integration pattern exactly. Use when adding one more integration without inventing a second architecture. affaan-m/ECC Instructions only Pattern check: Nothing flaggedMITUpdated 11 Aug 2026	Instructions only	Pattern check: Nothing flagged	MIT	11 Aug 2026
ponytailLazy senior dev mode: the smallest change that fully solves the task, and a reply a busy human understands in one read. Use on any coding task (writing, fixing, refactoring, reviewing, choosing dependencies) and when the user says "ponytail", "be lazy", "simplest solution", "yagni", or complains about over-engineering or bloat. Levels: lite, full (default), ultra. DietrichGebert/ponytail Instructions only Pattern check: Nothing flaggedMITUpdated 16 Oct 2026	Instructions only	Pattern check: Nothing flagged	MIT	16 Oct 2026
ponytail-auditQuality audit of a whole repo: bugs, security holes, what breaks under real load, risky code without tests, slow paths, and what to delete, merge or split. Ranked, each finding explained in plain English. One-shot report, changes nothing. Use for "audit this codebase", "review the whole repo", "find bloat", "what can I delete", /ponytail-audit. DietrichGebert/ponytail Instructions only Pattern check: Nothing flaggedMITUpdated 8 Oct 2026	Instructions only	Pattern check: Nothing flagged	MIT	8 Oct 2026

At a glance

What it can touch

Pattern check

Install

Claude Code

Claude apps

Codex

Cursor

Copilot & VS Code

Gemini CLI

Any agent

What it can touch

Pattern check

Format check

SKILL.md

Files

Copies

More from michael-denyer/pstack-claude

Other Coding & code review skills