Agent skill

Rift Backend Effect

by Compound-inc in Compound-inc/rift

A skill your agent uses when adding, reviewing, or refactoring backend code in Rift's TanStack Start app that should follow apps/start/BACKENDEFFECTPLAYBOOK.md.

Custom licenceAuto-check passedDevOps & Cloud

Install Rift Backend Effect

skills CLI
$ npx skills add Compound-inc/rift --skill rift-backend-effect -a claude-code

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

GitHub CLI
$ gh skill install Compound-inc/rift rift-backend-effect --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/Compound-inc/rift.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/rift-backend-effect .claude/skills/rift-backend-effect && 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
rift-backend-effect
GitHub stars
124
Token cost
~1.8k tokens
SKILL.md length
692 words
Files
5 (incl. references)
Skills in repo
5
Repo updated
First seen
Licence
Custom licence

At a glance

A skill your agent uses when adding, reviewing, or refactoring backend code in Rift's TanStack Start app that should follow apps/start/BACKENDEFFECTPLAYBOOK.md.

  • Works in 7 steps: Shape the boundary → Model errors first → Build the service → …
  • Refactoring backend code in Rifts TanStack Start app that should follow apps/start/BACKENDEFFECTPLAYBOOK.md
  • SKILL.md covers First Read, Default Shape, Working Rules and Implementation Workflow, plus 3 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Rift Backend Effect is an agent skill from Compound-inc/rift. Use when adding, reviewing, or refactoring backend code in Rift's TanStack Start app that should follow apps/start/BACKENDEFFECTPLAYBOOK.md. Covers Rift's Effect v4 service architecture, tagged domain errors, centralized runtime wiring, thin route boundaries, and when to consult deeper Effect references for HttpClient, HttpApi, SQL, testing, and observability.

Its SKILL.md is about 1.8k tokens, which your agent loads only when the skill is triggered. The skill folder holds 6 other files, including reference files (for example `agents/openai.yaml`, `references/effect-v4-notes.md` and `references/effect-v4-topic-map.md`).

It sits in DevOps & Cloud, covering Observability, SQL and Refactoring. It works with SQL and TanStack.

When your agent uses it

  • Refactoring backend code in Rifts TanStack Start app that should follow apps/start/BACKENDEFFECTPLAYBOOK.md
  • Tasks that involve Observability
  • Tasks that involve SQL

Example prompts

  • “/rift-backend-effect”

Workflow steps

7 steps, taken from the step headings in SKILL.md.

  1. Shape the boundary
  2. Model errors first
  3. Build the service
  4. Wire the runtime once
  5. Prefer shared server-effect helpers
  6. Keep route handlers thin
  7. Test the service boundary

What it can do on your machine

Read from SKILL.md and the folder at commit 4471fb5. 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 (its code samples are typescript).

    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

Rift Backend Effect loads about 1.8k tokens when it runs, and up to ~5.5k if it reads all its reference files. Until then it costs about 97 tokens; SKILL.md has 692 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~97
When it runs · the whole SKILL.md, loaded when a task matches
~1.8k
With references · SKILL.md plus every file in references/, read only if the agent opens them
~5.5k

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

Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 692 words (~1,772 tokens).

“Use this skill for backend work in /home/ari/repos/rift/apps/start when the change touches Effect services, runtimes, route handlers, or shared server-only infrastructure.”

— opening of SKILL.md by Compound-inc, Custom licence
name
rift-backend-effect

Read the full SKILL.md on GitHub

Files

SKILL.md and 4 other files (references) in .agents/skills/rift-backend-effect of Compound-inc/rift.

  • SKILL.md
  • agents/openai.yaml
  • references/effect-v4-notes.md
  • references/effect-v4-topic-map.md
  • references/rift-backend-examples.md

Open the folder on GitHubat commit 4471fb5

Compare with similar skills

Rift Backend Effect 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.

Rift Backend Effect compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Rift Backend Effect this skillCompound-inc/rift124—~1.8kAutomated safety check: PassCustom licence
Mz Query TracingMaterializeInc/materialize6.4k—~1.8kAutomated safety check: PassCustom licence
Sf Datacloud RetrieveJaganpro/sf-skills424—~1.4kAutomated safety check: PassMIT
Sf Datacloud SegmentJaganpro/sf-skills424—~1.2kAutomated safety check: PassMIT
Exploring LLM TracesPostHog/posthog40k—~4.4kAutomated safety check: PassCustom licence
Protheus Data Dictionary Lookuptotvs/engpro-advpl-tlpp-skills143—~1.5kAutomated safety check: PassMIT

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Works with

Questions about Rift Backend Effect

What does Rift Backend Effect do?

A skill your agent uses when adding, reviewing, or refactoring backend code in Rift's TanStack Start app that should follow apps/start/BACKENDEFFECTPLAYBOOK.md. Rift Backend Effect is an agent skill from Compound-inc/rift.md.

When should I use Rift Backend Effect?

Rift Backend Effect fits situations like: refactoring backend code in Rifts TanStack Start app that should follow apps/start/BACKENDEFFECTPLAYBOOK.md; tasks that involve Observability; tasks that involve SQL.

How do I install Rift Backend Effect in Claude Code?

Run `npx skills add Compound-inc/rift --skill rift-backend-effect -a claude-code`. Or copy the skill folder (.agents/skills/rift-backend-effect in Compound-inc/rift) into .claude/skills/rift-backend-effect in your project. Claude Code loads it when a task matches its description.

How do I install Rift Backend Effect in Codex?

Run `npx skills add Compound-inc/rift --skill rift-backend-effect -a codex`. Or copy the skill folder (.agents/skills/rift-backend-effect in Compound-inc/rift) into .agents/skills/rift-backend-effect in your project. Codex loads it when a task matches its description.

Can I use Rift Backend Effect 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 Compound-inc/rift --skill rift-backend-effect -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/rift-backend-effect, .gemini/skills/rift-backend-effect, .github/skills/rift-backend-effect and .opencode/skills/rift-backend-effect in your project.

What does Rift Backend Effect need to run?

SKILL.md names no scripts, command-line tools or credentials: Rift Backend Effect is instructions for the agent only.

Does Rift Backend Effect 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 Rift Backend Effect 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 Rift Backend Effect use?

Rift Backend Effect has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.

How many tokens does Rift Backend Effect use?

About 1.8k tokens (SKILL.md is roughly 7.1k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 3.7k tokens, read only when the agent opens those files.

What are the alternatives to Rift Backend Effect?

Skills that share tags, products or a category with Rift Backend Effect: Mz Query Tracing (MaterializeInc/materialize, 6.4k stars), Sf Datacloud Retrieve (Jaganpro/sf-skills, 424 stars), Sf Datacloud Segment (Jaganpro/sf-skills, 424 stars) and Exploring LLM Traces (PostHog/posthog, 40k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Rift Backend Effect?

Compound-inc (a GitHub organization) maintains it in Compound-inc/rift, which has 124 GitHub stars. The repository holds 5 skills in this directory. The repository was last updated on September 28, 2026.

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