attrition

CLI for the attrition.sh Agent Workspace catalog. Installs agent harness, UI, RAG, and eval patterns from the catalog into .claude/skills/ and AGENTS.md in under 2 minutes, cold.

Catalog: https://agentworkspace.attrition.sh

Quick start

npx attrition-sh pack install rag-hybrid-bm25-vector

rag-hybrid-bm25-vector is a real slug in the catalog — swap it for any pack returned by attrition pack list.

This creates:

• .claude/skills/<slug>/SKILL.md — the skill, with frontmatter
• AGENTS.md — appended with a managed fragment between <!-- attrition:pack:<slug>:start --> / :end markers
• .attrition/installed.json — lockfile for drift detection

Re-running the same install is idempotent: the AGENTS.md fragment is replaced in place (no duplicates) and the SKILL.md is overwritten atomically.

Commands

• attrition pack install <slug> — install a pack (default target: Claude Code)
• attrition pack install <slug> --target=cursor — install as a Cursor rule (.cursor/rules/<slug>.mdc)
• attrition pack list — list all registry packs
• attrition pack search <query> — search packs
• attrition pack verify — compare installed versions against the registry

Cursor users

npx attrition-sh pack install rag-hybrid-bm25-vector --target=cursor

With --target=cursor, the CLI writes:

• .cursor/rules/<slug>.mdc — the rule, with Cursor-style MDC frontmatter (description, globs, alwaysApply: false). Cursor picks up any file under .cursor/rules/*.mdc automatically — no additional project config required.
• .attrition/installed.json — the same lockfile as the Claude Code target, but with target: "cursor" recorded per pack so attrition pack verify and the catalog reverse-index can tell the targets apart.

No AGENTS.md is created or modified with --target=cursor. Claude Code and Cursor can coexist in the same repo: install pack A to claude-code and pack B to cursor and both end up tracked in the same lockfile with distinct target fields.

Global flags

• --registry <url> — override ATTRITION_REGISTRY_URL
• --dry-run — print planned changes without writing
• --no-telemetry — disable anonymous install ping
• --json — emit machine-readable JSON output

Environment variables

• ATTRITION_REGISTRY_URL — base URL for the pack registry (default: https://agentworkspace.attrition.sh)

Safety guarantees

• Slug validation (^[a-z0-9][a-z0-9-]{0,99}$) at every entry point.
• Path resolution via path.resolve + path.relative — no writes escape cwd.
• Atomic file writes (tmp file + rename) — never partial on crash.
• AGENTS.md marker corruption is detected BEFORE any writes; installs abort loudly.
• Re-installing the same slug is idempotent — single fragment in AGENTS.md.
• Registry errors produce non-zero exit codes; no partial state.
• Telemetry is fire-and-forget; failures never block install.

Dev

cd cli
npm install
npm run build
npm test
npm run dev -- pack list