A skill your agent uses when a personal or team operating system needs a bounded redesign using Four-C, closed-loop controls, 70/30 allocation, 3B creativity, experiments, and prediction-error…

MITAuto-check passed

Install Anthropic Os

skills CLI
$ npx skills add Mark393295827/third-brain-v7-skills --skill anthropic-os -a claude-code

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

GitHub CLI
$ gh skill install Mark393295827/third-brain-v7-skills anthropic-os --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/Mark393295827/third-brain-v7-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/anthropic-os .claude/skills/anthropic-os && 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
anthropic-os
GitHub stars
141
Token cost
~1.6k tokens
SKILL.md length
698 words
Files
2 (incl. references)
Skills in repo
21
Repo updated
First seen
Licence
MIT

At a glance

A skill your agent uses when a personal or team operating system needs a bounded redesign using Four-C, closed-loop controls, 70/30 allocation, 3B creativity, experiments, and prediction-error…

  • Works in 8 steps: Audit the closed loop: trace substrate,… → Choose one flywheel and its bottleneck;… → Apply 3B: Bending adapts a practice to… → …
  • Team operating system needs a bounded redesign using Four-C
  • SKILL.md covers Usage Template, Workflow, Failure Protocol and Output Contract, plus 3 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Anthropic Os is an agent skill from Mark393295827/third-brain-v7-skills. Use when a personal or team operating system needs a bounded redesign using Four-C, closed-loop controls, 70/30 allocation, 3B creativity, experiments, and prediction-error learning.

Its SKILL.md is about 1.6k tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files, including reference files (for example `references/operating-system-playbook.md`).

The repository describes itself as: agent wiki +engineering skills. The licence is MIT.

When your agent uses it

  • Team operating system needs a bounded redesign using Four-C
  • Closed-loop controls
  • 70/30 allocation
  • Prediction-error learning

Example prompts

  • “/anthropic-os”

Workflow steps

8 steps, taken from the first numbered list in SKILL.md.

  1. Audit the closed loop: trace substrate, DRI, custom taste/eval, review bandwidth, prediction, feedback latency, and quiet-success stop.
  2. Choose one flywheel and its bottleneck; allocate roughly 70% to a validated big bet and 30% to business-as-usual/option preservation only…
  3. Apply 3B: Bending adapts a practice to context, Breaking removes a limiting rule or metric through an approved experiment, Blending…
  4. Generate alternatives, then select one two-week-or-shorter experiment with hypothesis, owner, cohort, metric, guardrail, budget, stop, and…
  5. Run dual prediction when useful: human and agent predict outcome independently; compare actual result, record prediction error, and update…
  6. Add a success-disaster pre-mortem: what breaks if adoption or throughput exceeds expectations; define load, quality, permission, support…
  7. Escalate permission through observe -> co-drive -> scoped reversible action -> monitored routine -> audited autonomy. Keys and environment…
  8. Review evidence; keep, adapt, retire, or combine the practice. No automatic archival or policy installation: human approval and the…

What it can do on your machine

Read from SKILL.md and the folder at commit 5a64514. 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

Anthropic Os loads about 1.6k tokens when it runs, and up to ~2.4k if it reads all its reference files. Until then it costs about 49 tokens; SKILL.md has 698 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~49
When it runs · the whole SKILL.md, loaded when a task matches
~1.6k
With references · SKILL.md plus every file in references/, read only if the agent opens them
~2.4k

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

The full file from Mark393295827/third-brain-v7-skills at commit 5a64514, republished under its MIT licence (© Mark393295827). 698 words, ~1,613 tokens.

Download SKILL.mdSave it as .claude/skills/anthropic-os/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.
name
anthropic-os
description
Use when a personal or team operating system needs a bounded redesign using Four-C, closed-loop controls, 70/30 allocation, 3B creativity, experiments, and prediction-error learning.
metadata.version
8.1.0
metadata.updated
2026-08-18
metadata.profile
high-risk
metadata.assumes
The operating system has a named owner, observable workflow, local metrics, and a review cadence.
metadata.conflicts_with
Copying extreme productivity claims, surveillance without governance, automatic policy evolution, or cadence before context and capability.

Anthropic OS

<skill_contract> <input>One owned work system with its workflow, users, traces, permissions, metrics, constraints, and review horizon.</input> <output>A supervised operating-system redesign with one bounded experiment, control gates, cadence, and rollback.</output> <done>The selected practice has a baseline, hypothesis, owner, metric, guardrail, budget, stop rule, and review receipt.</done> <non_goals>Extreme productivity claims, surveillance, automatic policy evolution, or cadence without supporting context and capability.</non_goals>

Redesign one work system as a supervised learning loop. Plasticity means practices may change from evidence; competition means alternatives contend; constraint means attention, time, permissions, and review bandwidth shape the design. Load references/operating-system-playbook.md for diagnostics and artifacts.

Usage Template

Provide: system boundary, owner, desired outcome, users, current workflow, local metrics, traces/data, permissions, failure history, review capacity, and horizon.

Workflow

<intake>

Define one operating bottleneck and baseline. Run Four-C in order: Context (truth/history), Connections (systems/accounts), Capabilities (skills/SOPs/evals), Cadence (triggers/reviews). Do not add automation cadence until the first three can support and verify it.

</intake>

<unknowns_gate>

Treat productivity multipliers, culture narratives, maturity scores, and vendor case claims as hypotheses until local evidence exists. If outcome owner, trace consent, or approval authority is absent, return NEEDS_INPUT. Do not infer the expansion of local labels such as CASH when the system has not defined them.

</unknowns_gate>

<execute>
  1. Audit the closed loop: trace substrate, DRI, custom taste/eval, review bandwidth, prediction, feedback latency, and quiet-success stop.
  2. Choose one flywheel and its bottleneck; allocate roughly 70% to a validated big bet and 30% to business-as-usual/option preservation only when local constraints justify it.
  3. Apply 3B: Bending adapts a practice to context, Breaking removes a limiting rule or metric through an approved experiment, Blending combines mechanisms across domains.
  4. Generate alternatives, then select one two-week-or-shorter experiment with hypothesis, owner, cohort, metric, guardrail, budget, stop, and rollback.
  5. Run dual prediction when useful: human and agent predict outcome independently; compare actual result, record prediction error, and update decision weights only after repeated calibrated evidence.
  6. Add a success-disaster pre-mortem: what breaks if adoption or throughput exceeds expectations; define load, quality, permission, support, and rollback controls.
  7. Escalate permission through observe -> co-drive -> scoped reversible action -> monitored routine -> audited autonomy. Keys and environment enforce boundaries.
  8. Review evidence; keep, adapt, retire, or combine the practice. No automatic archival or policy installation: human approval and the promotion gate govern system changes.

Use independent evaluation for organizational, cultural, or high-impact recommendations. A rollback restores the prior practice/config while retaining evidence and decision history.

</execute>
<evaluate>

Compare baseline and outcome on the named metric and guardrails. Inspect operator comprehension, review load, false positives, prediction calibration, and unintended incentives. Reject “success” when throughput rises but quality, agency, privacy, or local understanding falls.

</evaluate>

<retry_policy>

max_attempts: 2 per practice experiment. Retry only after changing the hypothesis, constraint, cohort, or mechanism. Stop on repeated signature, weak feedback, review overload, guardrail regression, or NO_PROGRESS.

</retry_policy>

<state_contract>

Persist {run_id, status, attempt, budget, evidence, unknowns, last_error, next_action} plus system boundary, Four-C audit, maturity evidence, flywheel/bottleneck, allocation, predictions, experiment version, metrics/guardrails, consent/approval, independent review, rollback point, and promotion decision.

</state_contract>

Show full SKILL.md (196 more words)Show less

Failure Protocol

  • NEEDS_INPUT: owner, consent, outcome, or approval authority is missing.
  • INSUFFICIENT_EVIDENCE: a maturity/policy claim lacks local observations.
  • BLOCKED_PERMISSION: trace or delegated action exceeds authorized access.
  • VERIFY_FAILED: outcome, guardrail, comprehension, or calibration check fails.
  • NO_PROGRESS: changed experiments repeat the failure. max_attempts: 2.
  • BUDGET_STOP: preserve the prior operating system and return a supervised next test.

Output Contract

Return status, result (diagnosis, one redesigned loop, experiment, and review decision), evidence, unknowns, and next_action including approval or rollback.

Edge Cases

  • Leadership requests autonomous cadence but source context is stale: improve Context and Capabilities first; do not schedule theater.
  • A practice increases output while reviewers cannot explain changes: trigger quiet-success stop, reduce volume, and restore understanding before scaling.

Success Metrics

  • One owned bottleneck, experiment, feedback signal, and review date are explicit.
  • Local evidence, not borrowed multipliers, drives maturity and allocation decisions.
  • The operating system improves while agency, privacy, quality, and comprehension remain within guardrails.

Quality Gates

  • Four-C order, DRI, trace consent, eval, and review budget are explicit.
  • 3B changes are experiments, not automatic policy mutations.
  • Independent review, human approval, and rollback match impact.
  • Prediction errors and superseded practices remain auditable.
  • Promotion requires repeated support/local verification and a cheap check.

</skill_contract>

© Mark393295827, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 1 other file (references) in skills/anthropic-os of Mark393295827/third-brain-v7-skills.

  • SKILL.md
  • references/operating-system-playbook.md

Open the folder on GitHubat commit 5a64514

Compare with similar skills

Anthropic Os 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.

Anthropic Os compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Anthropic Os this skillMark393295827/third-brain-v7-skills141—~1.6kAutomated safety check: PassMIT
It Operationsdavila7/claude-code-templates33k1 repos~3.7kAutomated safety check: PassMIT
Operator Approval Loopaffaan-m/ECC276k—~3.3kAutomated safety check: PassMIT
Business Operations Skillsalirezarezvani/claude-skills28k—~2.3kAutomated safety check: PassMIT
Personal Operating Manualmohitagw15856/pm-claude-skills1.4k—~1kAutomated safety check: PassMIT
Kubernetes Operatoralirezarezvani/claude-skills28k—~2.8kAutomated safety check: PassMIT

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Questions about Anthropic Os

What does Anthropic Os do?

A skill your agent uses when a personal or team operating system needs a bounded redesign using Four-C, closed-loop controls, 70/30 allocation, 3B creativity, experiments, and prediction-error…. Anthropic Os is an agent skill from Mark393295827/third-brain-v7-skills. Use when a personal or team operating system needs a bounded redesign using Four-C, closed-loop controls, 70/30 allocation, 3B creativity, experiments, and prediction-error learning.

When should I use Anthropic Os?

Anthropic Os fits situations like: team operating system needs a bounded redesign using Four-C; closed-loop controls; 70/30 allocation; prediction-error learning.

How do I install Anthropic Os in Claude Code?

Run `npx skills add Mark393295827/third-brain-v7-skills --skill anthropic-os -a claude-code`. Or copy the skill folder (skills/anthropic-os in Mark393295827/third-brain-v7-skills) into .claude/skills/anthropic-os in your project. Claude Code loads it when a task matches its description.

How do I install Anthropic Os in Codex?

Run `npx skills add Mark393295827/third-brain-v7-skills --skill anthropic-os -a codex`. Or copy the skill folder (skills/anthropic-os in Mark393295827/third-brain-v7-skills) into .agents/skills/anthropic-os in your project. Codex loads it when a task matches its description.

Can I use Anthropic Os 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 Mark393295827/third-brain-v7-skills --skill anthropic-os -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/anthropic-os, .gemini/skills/anthropic-os, .github/skills/anthropic-os and .opencode/skills/anthropic-os in your project.

What does Anthropic Os need to run?

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

Does Anthropic Os 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 Anthropic Os 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 Anthropic Os use?

Anthropic Os is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Anthropic Os use?

About 1.6k tokens (SKILL.md is roughly 6.5k 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 801 tokens, read only when the agent opens those files.

What are the alternatives to Anthropic Os?

Skills that share tags, products or a category with Anthropic Os: It Operations (davila7/claude-code-templates, 33k stars), Operator Approval Loop (affaan-m/ECC, 276k stars), Business Operations Skills (alirezarezvani/claude-skills, 28k stars) and Personal Operating Manual (mohitagw15856/pm-claude-skills, 1.4k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Anthropic Os?

Mark393295827 (a GitHub user) maintains it in Mark393295827/third-brain-v7-skills, which has 141 GitHub stars. The repository holds 21 skills in this directory. The repository was last updated on September 19, 2026.

Source: Mark393295827/third-brain-v7-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.