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Official agent skill

Principle Migrate Callers Then Delete Legacy APIs

by cursor in cursor/plugins

Apply when introducing a new internal API while old callers still exist.

OfficialNo licenceAuto-check passed

Install Principle Migrate Callers Then Delete Legacy APIs

skills CLI
$ npx skills add cursor/plugins --skill principle-migrate-callers-then-delete-legacy-apis -a claude-code

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

GitHub CLI
$ gh skill install cursor/plugins principle-migrate-callers-then-delete-legacy-apis --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/cursor/plugins.git skills-src && mkdir -p .claude/skills && cp -r skills-src/pstack/skills/principle-migrate-callers-then-delete-legacy-apis .claude/skills/principle-migrate-callers-then-delete-legacy-apis && 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/

Facts

Skill name
principle-migrate-callers-then-delete-legacy-apis
GitHub stars
11k
Used in
8 other repos
Token cost
~287 tokens
SKILL.md length
127 words
Files
1
Skills in repo
99
Repo updated
First seen
Licence
None found

At a glance

Apply when introducing a new internal API while old callers still exist.

  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Principle Migrate Callers Then Delete Legacy APIs is an agent skill from cursor/plugins, published by the product's own GitHub organization. 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.

Its SKILL.md is about 290 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

The repository describes itself as: Cursor plugin specification and official plugins.

Example prompts

  • “/principle-migrate-callers-then-delete-legacy-apis”

What it can do on your machine

Read from SKILL.md and the folder at commit 9d76bca. 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

    No scripts in the folder and no shell commands in SKILL.md.

    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

Principle Migrate Callers Then Delete Legacy APIs loads about 287 tokens when it runs. Until then it costs about 56 tokens; SKILL.md has 127 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~56
When it runs · the whole SKILL.md, loaded when a task matches
~287

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

Without a licence we can't republish the file, so here is its outline and opening line. It has 127 words (~287 tokens).

“When we decide a new API is the right design, migrate callers and remove the old API in the same refactor wave instead of preserving compatibility layers.”

— opening of SKILL.md by cursor
name
principle-migrate-callers-then-delete-legacy-apis
disable-model-invocation
true

Read the full SKILL.md on GitHub

Files

Just SKILL.md in pstack/skills/principle-migrate-callers-then-delete-legacy-apis of cursor/plugins.

Open the folder on GitHubat commit 9d76bca

Used in 8 other repositories

We found 8 copies of this SKILL.md (exact, near-identical or edited) in other folders, from 8 other GitHub owners. This page covers the copy in cursor/plugins, which our catalogue first saw on October 7, 2026.

Compare with similar skills

Principle Migrate Callers Then Delete Legacy APIs 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.

Principle Migrate Callers Then Delete Legacy APIs compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Principle Migrate Callers Then Delete Legacy APIs this skillcursor/plugins11k8 repos~287Automated safety check: PassNone
Migrate Internal Package into GhostTryGhost/Ghost56k—~3.8kAutomated safety check: PassMIT
Migrating LLM Gateway CallersPostHog/posthog40k—~1.3kAutomated safety check: PassCustom licence
Legacy Migration Plannertech-leads-club/agent-skills7k—~1.8kAutomated safety check: PassCC-BY-4.0
Reversible MigrationJuliusBrussee/caveman111k1 repos~196Automated safety check: PassApache-2.0
Convert Internal Package to TypeScriptTryGhost/Ghost56k—~1.2kAutomated safety check: PassMIT

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  • Migrate Internal Package into Ghost

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Questions about Principle Migrate Callers Then Delete Legacy APIs

What does Principle Migrate Callers Then Delete Legacy APIs do?

Apply when introducing a new internal API while old callers still exist. Principle Migrate Callers Then Delete Legacy APIs is an agent skill from cursor/plugins, published by the product's own GitHub organization. Apply when introducing a new internal API while old callers still exist.

How do I install Principle Migrate Callers Then Delete Legacy APIs in Claude Code?

Run `npx skills add cursor/plugins --skill principle-migrate-callers-then-delete-legacy-apis -a claude-code`. Or copy the skill folder (pstack/skills/principle-migrate-callers-then-delete-legacy-apis in cursor/plugins) into .claude/skills/principle-migrate-callers-then-delete-legacy-apis in your project. Claude Code loads it when a task matches its description.

How do I install Principle Migrate Callers Then Delete Legacy APIs in Codex?

Run `npx skills add cursor/plugins --skill principle-migrate-callers-then-delete-legacy-apis -a codex`. Or copy the skill folder (pstack/skills/principle-migrate-callers-then-delete-legacy-apis in cursor/plugins) into .agents/skills/principle-migrate-callers-then-delete-legacy-apis in your project. Codex loads it when a task matches its description.

Can I use Principle Migrate Callers Then Delete Legacy APIs 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 cursor/plugins --skill principle-migrate-callers-then-delete-legacy-apis -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/principle-migrate-callers-then-delete-legacy-apis, .gemini/skills/principle-migrate-callers-then-delete-legacy-apis, .github/skills/principle-migrate-callers-then-delete-legacy-apis and .opencode/skills/principle-migrate-callers-then-delete-legacy-apis in your project.

What does Principle Migrate Callers Then Delete Legacy APIs need to run?

SKILL.md names no scripts, command-line tools or credentials: Principle Migrate Callers Then Delete Legacy APIs is instructions for the agent only.

Does Principle Migrate Callers Then Delete Legacy APIs 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 Principle Migrate Callers Then Delete Legacy APIs 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 Principle Migrate Callers Then Delete Legacy APIs use?

No licence was found for Principle Migrate Callers Then Delete Legacy APIs or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.

How many tokens does Principle Migrate Callers Then Delete Legacy APIs use?

About 287 tokens (SKILL.md is roughly 1.1k 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 Principle Migrate Callers Then Delete Legacy APIs?

Skills that share tags, products or a category with Principle Migrate Callers Then Delete Legacy APIs: Migrate Internal Package into Ghost (TryGhost/Ghost, 56k stars), Migrating LLM Gateway Callers (PostHog/posthog, 40k stars), Legacy Migration Planner (tech-leads-club/agent-skills, 7k stars) and Reversible Migration (JuliusBrussee/caveman, 111k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Principle Migrate Callers Then Delete Legacy APIs?

cursor (a GitHub organization, an official publisher) maintains it in cursor/plugins, which has 10,793 GitHub stars. The repository holds 99 skills in this directory. The repository was last updated on October 11, 2026.

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