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Fragments

Add a deploy target, service or tool to your project. Find a fragment that fits your stack, then give your coding agent the brief to apply it.

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Fragment catalogue

AGENTS.md and agent guardrails

AGENTS.md as the one project guide for every coding agent, with hooks for Claude Code, Codex, Cursor and OpenCode that block destructive commands and secret writes. Claude Code and OpenCode also lint on write and format the agent's edits; Claude Code gets CLAUDE.md and Cursor a rule pointing at AGENTS.md.

agent-ops
Applies to all stacks

Projects using it · past 28 days

24,965

Usage trend

Weekly projects using AGENTS.md and agent guardrails

Bun binary releases

Release a Bun-compiled CLI as standalone binaries for macOS and glibc Linux on x64 and arm64, with SHA256SUMS, a checksum-verifying install.sh, an atomic self-update command and a tag-triggered GitHub release workflow.

release
Applies to 1 stack

Projects using it · past 28 days

1,620

Usage trend

Weekly projects using Bun binary releases

Claude Code TypeScript hooks

Bun TypeScript hook helpers and tested Claude Code guards on top of agent-ops (destructive commands, package manager, generated files, typecheck on write), plus /check, /test and /feature commands, architect and reviewer agents, and a docs/harness.md guide.

agent-ops
Applies to 11 stacks

Projects using it · past 28 days

33,715

Usage trend

Weekly projects using Claude Code TypeScript hooks

Claude Essentials plugin

Enables the claude-essentials (ce) Claude Code plugin for the project and adds path-scoped rules that point Claude at its skills for testing, error handling, debugging, and writing.

agent-ops
Applies to all stacks

Projects using it · past 28 days

10,255

Usage trend

Weekly projects using Claude Essentials plugin

Clerk auth for Expo and Hono

Clerk sign-in for the Expo app and session verification on the Hono API, with auth on by default behind a public-path allowlist, a dev bypass, and tests that run Clerk's real verification against a local keypair with no account or network.

vendor
Applies to 1 stack

Projects using it · past 28 days

10,325

Usage trend

Weekly projects using Clerk auth for Expo and Hono

Cloudflare D1 with Drizzle

Typed D1 bindings, Drizzle's D1 driver, checked-in SQL migrations, and isolated local database tests without a Cloudflare account.

service
Applies to 1 stack

Projects using it · past 28 days

10

Usage trend

Weekly projects using Cloudflare D1 with Drizzle

Cloudflare Pages

Deploy a static site's build output to Cloudflare Pages with wrangler (installed as a dev dependency, run through bunx), covering production deploys from the default branch, preview deploys for pull requests, and headers and redirects config.

deploy
Applies to 1 stack

Projects using it · past 28 days

435

Usage trend

Weekly projects using Cloudflare Pages

Docker images + GHCR

Production container images (multi-stage, non-root, healthchecked) for each deployable part of the project, plus a GitHub Actions workflow that builds and publishes them to GitHub Container Registry after CI passes.

deploy
Applies to 5 stacks

Projects using it · past 28 days

3,145

Usage trend

Weekly projects using Docker images + GHCR

Effect Schema

Effect Schema as the one validation and typing layer for data crossing a trust boundary (requests, config, storage, third-party and LLM output), with branded ids, tagged errors, JSON Schema for tools, and round-trip plus property tests.

tooling
Applies to 9 stacks

Projects using it · past 28 days

Not enough data

Usage trend

Weekly projects using Effect Schema

Effect testing and API skill

Effect testing with @effect/vitest (fresh real layers per test, TestClock instead of sleeps, typed failure and defect assertions), shipped Effect guidance for each agent, and an agent skill written from the installed Effect release's declarations.

tooling
Applies to 9 stacks

Projects using it · past 28 days

18,320

Usage trend

Weekly projects using Effect testing and API skill

Git hooks (lefthook)

lefthook git hooks that format and lint staged files, enforce Conventional Commits, and run the project's tests before push.

tooling
Applies to all stacks

Projects using it · past 28 days

55,740

Usage trend

Weekly projects using Git hooks (lefthook)

GitHub Actions CI

A GitHub Actions workflow that runs the project's own make targets or package scripts on every push and pull request, with SHA-pinned actions in the default preset, least-privilege permissions, and path-filtered jobs for monorepos.

ci
Applies to all stacks

Projects using it · past 28 days

55,675

Usage trend

Weekly projects using GitHub Actions CI

GoReleaser

Tag-driven releases for a Go binary with GoReleaser, covering cross-platform builds with version ldflags, archives, checksums, a conventional-commit changelog, a GitHub release workflow, and optional Homebrew publishing.

release
Applies to 1 stack

Projects using it · past 28 days

845

Usage trend

Weekly projects using GoReleaser

OpenRouter CLI chat

A terminal chat app for typescript-cli on OpenRouter: an OpenTUI chat screen and scriptable commands with NDJSON events, tools also served by a stdio MCP server, chats saved as JSON with Markdown export, and stubbed replay and eval checks.

app
Applies to 1 stack

Projects using it · past 28 days

1,605

Usage trend

Weekly projects using OpenRouter CLI chat

OpenRouter LLM provider

OpenRouter as the LLM provider for a TypeScript project: an optional API key, model discovery with a ten-minute cache, routing settings, bounded retries with safe upstream errors, a scriptable local stub server for tests, and an eval report format with a dry-run checker.

vendor
Applies to 3 stacks

Projects using it · past 28 days

1,845

Usage trend

Weekly projects using OpenRouter LLM provider

OpenRouter web chat

A web chat app on OpenRouter: streaming replies, a model picker, tool calls, contact extraction, server-side history, usage and cost, Markdown export and a stub-backed Playwright flow.

app
Applies to 1 stack

Projects using it · past 28 days

Not enough data

Usage trend

Weekly projects using OpenRouter web chat

OpenTelemetry (OTLP) for Effect servers

OpenTelemetry traces, logs and metrics over OTLP for the Effect server in typescript-api, astro-fullstack and react-router. One observability layer adds trace ids to the existing logs, exports nothing without an endpoint, and is tested with an in-memory tracer and a loopback OTLP receiver.

tooling
Applies to 3 stacks

Projects using it · past 28 days

Not enough data

Usage trend

Weekly projects using OpenTelemetry (OTLP) for Effect servers

PostgreSQL with Drizzle for Next.js and SvelteKit

PostgreSQL for the Next.js and SvelteKit stacks through Drizzle ORM and node-postgres (pg): Docker Compose dev and test databases, checked-in SQL migrations with a drift check, a server-only database module and repository, a readiness route, and tests on databases cloned from a migrated template.

service
Applies to 2 stacks

Projects using it · past 28 days

Not enough data

Usage trend

Weekly projects using PostgreSQL with Drizzle for Next.js and SvelteKit

PostgreSQL with Effect SQL

PostgreSQL for the Effect stacks (typescript-api, react-router, astro-fullstack): Docker Compose dev and test databases, migrations run by an explicit command, a scoped connection pool, a schema-decoding repository behind an Effect service, and tests on a private database per test file.

service
Applies to 3 stacks

Projects using it · past 28 days

Not enough data

Usage trend

Weekly projects using PostgreSQL with Effect SQL

PostgreSQL with SQLAlchemy for Python

PostgreSQL for the FastAPI stacks (python-react, python-api): Docker Compose dev and test services with healthchecks, SQLAlchemy async models with Alembic migrations, make db-* targets, and a test harness that gives each test file its own database cloned from a migrated template.

service
Applies to 2 stacks

Projects using it · past 28 days

735

Usage trend

Weekly projects using PostgreSQL with SQLAlchemy for Python

PostHog analytics

PostHog analytics in the web client, disabled when no key is set so tests, CI, and sandboxes need no account, with a typed event catalog and a pre-init buffer.

vendor
Applies to 5 stacks

Projects using it · past 28 days

6,395

Usage trend

Weekly projects using PostHog analytics

REST resource conventions

Agent rules for naming and shaping HTTP resources (plural nouns, methods and status codes, one resource shape, cursor pagination, versioning), independent of framework and layout, plus an AGENTS.md section recording the project's choices.

tooling
Applies to 6 stacks

Projects using it · past 28 days

13,330

Usage trend

Weekly projects using REST resource conventions

rr remote test runner

Configures rr (github.com/rileyhilliard/rr) so the project's test, lint, and build commands can run on remote machines over SSH, with a committed .rr.yaml of named tasks, an AGENTS.md section, and the rr Claude Code plugin.

tooling
Applies to all stacks

Projects using it · past 28 days

9,905

Usage trend

Weekly projects using rr remote test runner

23 of 23 fragments

Adjusted counts of projects using each fragment in the past 28 days, reported by the CLI and rounded to 5. One project can use several fragments; these counts cannot be added together as unique projects. Missing counts are not zero. Trending highlights rising use compared with a fragment’s own recent baseline.

What people are adding

Explore project usage for up to six of the most-used fragments with published history. One project can use several fragments, so these series overlap. See what is gaining use.

Projects per week, by fragment

Weekly project counts for each fragment, not individual add commands.

Projects per week by fragment: time span
Sep 1Oct 15k10k15kGit hooks (lefthook)GitHub Actions CIClaude Code TypeScript hooksAGENTS.md and agent guardrailsEffect testing and API skillREST resource conventions
Sep 1Oct 15k10k15kGit hooks (lefthook)GitHub Actions CIClaude Code TypeScript hooksAGENTS.md and agent guardrailsEffect testing and API skillREST resource conventions
Sep 1Oct 15k10k15kGit hooks (lefthook)GitHub Actions CIClaude Code TypeScript hooksAGENTS.md and agent guardrailsEffect testing and API skillREST resource conventions
Sep 1Oct 15k10k15kGit hooks (lefthook)GitHub Actions CIClaude Code TypeScript hooksAGENTS.md and agent guardrailsEffect testing and API skillREST resource conventions
Sep 1Oct 15k10k15kGit hooks (lefthook)GitHub Actions CIClaude Code TypeScript hooksAGENTS.md and agent guardrailsEffect testing and API skillREST resource conventions
Sep 1Oct 15k10k15kGit hooks (lefthook)GitHub Actions CIClaude Code TypeScript hooksAGENTS.md and agent guardrailsEffect testing and API skillREST resource conventions
Sep 1Oct 15k10k15kGit hooks (lefthook)GitHub Actions CIClaude Code TypeScript hooksAGENTS.md and agent guardrailsEffect testing and API skillREST resource conventions
Sep 1Oct 15k10k15kGit hooks (lefthook)GitHub Actions CIClaude Code TypeScript hooksAGENTS.md and agent guardrailsEffect testing and API skillREST resource conventions
Aug 1Sep 1Oct 105k10k15kGit hooks (lefthook)GitHub Actions CIClaude Code TypeScript hooksAGENTS.md and agent guardrailsEffect testing and API skillREST resource conventions
Aug 1Sep 1Oct 105k10k15kGit hooks (lefthook)GitHub Actions CIClaude Code TypeScript hooksAGENTS.md and agent guardrailsEffect testing and API skillREST resource conventions
Aug 1Sep 1Oct 105k10k15kGit hooks (lefthook)GitHub Actions CIClaude Code TypeScript hooksAGENTS.md and agent guardrailsEffect testing and API skillREST resource conventions
Aug 1Sep 1Oct 105k10k15kGit hooks (lefthook)GitHub Actions CIClaude Code TypeScript hooksAGENTS.md and agent guardrailsEffect testing and API skillREST resource conventions
Aug 1Sep 1Oct 105k10k15kGit hooks (lefthook)GitHub Actions CIClaude Code TypeScript hooksAGENTS.md and agent guardrailsEffect testing and API skillREST resource conventions
Aug 1Sep 1Oct 105k10k15kGit hooks (lefthook)GitHub Actions CIClaude Code TypeScript hooksAGENTS.md and agent guardrailsEffect testing and API skillREST resource conventions
Aug 1Sep 1Oct 105k10k15kGit hooks (lefthook)GitHub Actions CIClaude Code TypeScript hooksAGENTS.md and agent guardrailsEffect testing and API skillREST resource conventions
Aug 1Sep 1Oct 105k10k15kGit hooks (lefthook)GitHub Actions CIClaude Code TypeScript hooksAGENTS.md and agent guardrailsEffect testing and API skillREST resource conventions

Available published history, up to 180 days. Earlier weeks are not supplied by this snapshot.

  • Git hooks (lefthook)
  • GitHub Actions CI
  • Claude Code TypeScript hooks
  • AGENTS.md and agent guardrails
  • Effect testing and API skill
  • REST resource conventions

Adjusted project counts per UTC week, rounded to 5. Hidden counts are missing, not zero.

Data table
Week endingFragmentProjects
2026-07-05Git hooks (lefthook)2700
2026-07-12Git hooks (lefthook)4450
2026-07-19Git hooks (lefthook)6260
2026-07-26Git hooks (lefthook)7615
2026-08-02Git hooks (lefthook)8255
2026-08-09Git hooks (lefthook)8945
2026-08-16Git hooks (lefthook)9610
2026-08-23Git hooks (lefthook)10260
2026-08-30Git hooks (lefthook)10860
2026-09-06Git hooks (lefthook)11425
2026-09-13Git hooks (lefthook)12340
2026-09-20Git hooks (lefthook)12885
2026-09-27Git hooks (lefthook)13555
2026-10-04Git hooks (lefthook)14430
2026-10-11Git hooks (lefthook)14790
2026-10-18Git hooks (lefthook)15450
2026-10-25Git hooks (lefthook)15405
2026-07-05GitHub Actions CI2735
2026-07-12GitHub Actions CI4425
2026-07-19GitHub Actions CI6275
2026-07-26GitHub Actions CI7665
2026-08-02GitHub Actions CI8270
2026-08-09GitHub Actions CI8930
2026-08-16GitHub Actions CI9680
2026-08-23GitHub Actions CI10245
2026-08-30GitHub Actions CI10890
2026-09-06GitHub Actions CI11425
2026-09-13GitHub Actions CI12380
2026-09-20GitHub Actions CI12910
2026-09-27GitHub Actions CI13555
2026-10-04GitHub Actions CI14540
2026-10-11GitHub Actions CI14750
2026-10-18GitHub Actions CI15490
2026-10-25GitHub Actions CI15335
2026-07-05Claude Code TypeScript hooks1655
2026-07-12Claude Code TypeScript hooks2615
2026-07-19Claude Code TypeScript hooks3785
2026-07-26Claude Code TypeScript hooks4580
2026-08-02Claude Code TypeScript hooks4990
2026-08-09Claude Code TypeScript hooks5320
2026-08-16Claude Code TypeScript hooks5740
2026-08-23Claude Code TypeScript hooks6170
2026-08-30Claude Code TypeScript hooks6535
2026-09-06Claude Code TypeScript hooks6815
2026-09-13Claude Code TypeScript hooks7425
2026-09-20Claude Code TypeScript hooks7600
2026-09-27Claude Code TypeScript hooks7825
2026-10-04Claude Code TypeScript hooks8435
2026-10-11Claude Code TypeScript hooks8795
2026-10-18Claude Code TypeScript hooks9405
2026-10-25Claude Code TypeScript hooks9475
2026-07-05AGENTS.md and agent guardrails1220
2026-07-12AGENTS.md and agent guardrails2060
2026-07-19AGENTS.md and agent guardrails2835
2026-07-26AGENTS.md and agent guardrails3560
2026-08-02AGENTS.md and agent guardrails3760
2026-08-09AGENTS.md and agent guardrails4085
2026-08-16AGENTS.md and agent guardrails4465
2026-08-23AGENTS.md and agent guardrails4650
2026-08-30AGENTS.md and agent guardrails4925
2026-09-06AGENTS.md and agent guardrails5215
2026-09-13AGENTS.md and agent guardrails5590
2026-09-20AGENTS.md and agent guardrails6010
2026-09-27AGENTS.md and agent guardrails6440
2026-10-04AGENTS.md and agent guardrails6790
2026-10-11AGENTS.md and agent guardrails6805
2026-10-18AGENTS.md and agent guardrails6880
2026-10-25AGENTS.md and agent guardrails6715
2026-07-05Effect testing and API skill890
2026-07-12Effect testing and API skill1420
2026-07-19Effect testing and API skill2025
2026-07-26Effect testing and API skill2430
2026-08-02Effect testing and API skill2680
2026-08-09Effect testing and API skill2960
2026-08-16Effect testing and API skill3175
2026-08-23Effect testing and API skill3380
2026-08-30Effect testing and API skill3660
2026-09-06Effect testing and API skill3785
2026-09-13Effect testing and API skill4035
2026-09-20Effect testing and API skill4085
2026-09-27Effect testing and API skill4095
2026-10-04Effect testing and API skill4595
2026-10-11Effect testing and API skill4815
2026-10-18Effect testing and API skill5015
2026-10-25Effect testing and API skill5255
2026-07-05REST resource conventions635
2026-07-12REST resource conventions1065
2026-07-19REST resource conventions1425
2026-07-26REST resource conventions1770
2026-08-02REST resource conventions1895
2026-08-09REST resource conventions2170
2026-08-16REST resource conventions2335
2026-08-23REST resource conventions2455
2026-08-30REST resource conventions2610
2026-09-06REST resource conventions2650
2026-09-13REST resource conventions2890
2026-09-20REST resource conventions3010
2026-09-27REST resource conventions3045
2026-10-04REST resource conventions3310
2026-10-11REST resource conventions3560
2026-10-18REST resource conventions3675
2026-10-25REST resource conventions3695
How fragment usage is measured

Counts come from CLI telemetry for projects using each fragment. Only installs seen at least 24 hours before a project starts qualify. Each period counts at most three projects per install and is capped at three times the distinct networks. Counts below five are hidden. Usage is not a measure of compatibility or quality; check the fragment’s requirements before applying it.

Computed 31 Oct 2026, through 30 Oct 2026. Numbers describe stacks projects, not the ecosystem.