AI & Agents·v1.13.0

Agents Best Practices Agent Skill

Use this skill when designing, generating an MVP blueprint for, auditing, refactoring, or explaining an agentic harness for any domain.

Context cost
106.2k tokensestimated from the bundle, loaded when it triggers
Bundle
24 files · 424.6 kBtext throughout, nothing executable
Licence
MITthe author’s own terms
Last change
—v1.13.0
Servers it uses
Noneruns standalone

What it does

Use this skill when designing, generating an MVP blueprint for, auditing, troubleshooting, refactoring, or explaining an agentic harness for any domain. Covers provider-neutral agent architecture for OpenAI, Anthropic, and OpenAI-compatible APIs: agent loops, tool design, record provenance, interactive presentation, user-memory lifecycles, environment-adaptive tools, speculative tool execution, late-bound capabilities, permissions, system prompts, planning, goals, always-on agents and durable runtime, adaptive agent teams, context compaction, memory, skills, MCP/external connectors…

What this skill changes about the agent has not been set out here as a list. Its SKILL.md, shown below, says it in the author’s own words.

data sciencerefactoring
Filed under

AI & Agents

The skill itself

A skill is instructions the model reads, so you can see what you are getting: below is the start of its SKILL.md. The front matter loads with every session, the body loads when the skill triggers, and the whole file comes with the install.

SKILL.md29.5 kB · preview
--- name: agents-best-practices metadata: version: "1.13.0" scope: "provider-neutral-agent-harness" file_policy: "markdown-only" ---
10# Agents Best Practices
11
12Use this skill when the user asks how to build, improve, debug, or evaluate an agentic harness. This is a general-purpose agent architecture skill. Coding agents are one subdomain only; apply the same principles to research, finance, legal, support, operations, sales, healthcare, education, data analysis, procurement, and workflow automation agents.
13
14## Freshness and self-update
15
16Canonical source: [DenisSergeevitch/agents-best-practices](https://github.com/DenisSergeevitch/agents-best-practices), branch main. Installed copies are snapshots, not guaranteed-current guidance.
17
18Before applying this skill in each new task:
19
201. **Check upstream once.** Resolve the current main commit through an approved network tool and compare it with the installed copy's recorded source revision. A version number alone does not prove freshness. If the copy is behind or its provenance is unknown, retrieve SKILL.md and the needed references from that exact commit, then reread the entry point before using it. Record the source commit and skill version in working state; keep the task on that coherent snapshot rather than mixing revisions or repeatedly polling.
212. **Persist the refresh when permitted.** A clean checkout on main with the verified canonical remote may update by fast-forward only. Refresh a copied installation's owned Markdown package together only when its prior baseline proves there are no local customizations; otherwise use an isolated upstream snapshot for this task. Update installer-managed packages through their supported installer, not by editing caches. Never overwrite dirty, divergent, customized, or actively maintained source trees, delete unrelated files, or bypass filesystem approval.
223. **Handle unavailable updates honestly.** If installation writes are unavailable, use the retrieved snapshot without replacing the installation. If upstream cannot be checked or retrieved, continue with the available local copy and briefly disclose that freshness is unverified, unless the user requires verified-latest guidance. Do not claim an offline or failed check made the skill current.
23
24This updates skill knowledge only, not runtime policy or permissions. Preserve [skill governance](references/skills-and-connectors.md#skill-governance) and higher-priority instructions; do not execute downloaded code or recursively invoke self-update. When maintaining this repository, inspect the baseline and upstream revision without automatically replacing the working tree under edit.
25
26## Core stance
27
28An agent harness is the control plane around a model. The model proposes actions; the harness validates, authorizes, executes, records, summarizes, and returns observations. Keep the loop simple and make the runtime rigorous.
This is a preview of SKILL.md. Download or install the skill to get the whole thing.
In the file
SKILL.md3,492 words
Files24
LicenceMIT
Why you can read it

Nothing in a skill executes. The client loads the text and the model follows it, so a skill can be audited the way a runbook is — by reading it.

What it costs in context

Skills are not billed by the call. They are paid for in context: every token the instructions occupy is a token your code, your diff and your conversation cannot use. Here is what this one takes and when it takes it.

≈250
always loaded
The name and description, so the model knows the skill exists and when to reach for it.
105,900
on trigger
The instruction body and 23 supporting files, read only when the skill fires.
53.1%
of a 200k window
Ten skills this size would not fit in the window together.
050k100k150k200k context window

106.2k tokens, estimated from the bundle at four bytes to the token, held for the rest of the session once it triggers. Heavy. Teams tend to install this one per project rather than globally, and load it only when the job comes up.

Servers bill, skills cost

A server charges by the month. A skill charges once per session, in context, and then keeps charging it for as long as the session lives.

Before and after

The same question, put to the same model twice: once as it comes, and once with these instructions loaded.

No worked example has been published for this skill yet.

The procedure it runs

The procedure has not been set out here step by step. It is in the body of its SKILL.md: the start of it is shown above, and the whole file comes with the install.

Prose, not code

These steps are written for a model to follow, not executed by a runtime. It can still be told to skip one, and it will say so when it does.

Servers it uses

None. This skill calls no MCP servers at all.

Everything it needs is in the instructions, so it works in a project with nothing connected — the model reads the file and changes how it works with what it can already reach.

Its SKILL.md does not declare which tools it asks the agent for, so what it touches is whatever the instructions themselves ask for — read them before you install it.

What it asks for
Writes filesnot declared
Network accessnot declared

This SKILL.md carries no allowed-tools line, so neither is declared. A skill grants no permissions of its own — it can only ask for tools your client already has.

What it will not do

Every skill is narrow, and the useful ones say where they stop. These are the jobs this one is the wrong tool for.

What this skill is not for has not been published here. Nothing is implied by that: it is a section the author has not filled in.

What is in the bundle

24 files, 424.6 kB on disk. A bundle is text throughout: the instructions the model reads, plus the templates it fills in. 3 files of its source are not in the download — listed after these, with why.

  • SKILL.md29.5 kB
  • LICENSE1.1 kB
  • README.md27.8 kB
  • references/agent-legibility-feedback-loops.md7.8 kB
  • references/agentic-loop.md11.5 kB
  • references/architecture.md16.1 kB
  • references/checklists.md28.5 kB
  • references/coding-agents.md19.0 kB
  • references/context-memory-compaction.md19.4 kB
  • references/coverage-audit.md14.4 kB
  • references/environment-adaptive-tools.md22.4 kB
  • references/evals.md38.8 kB
  • references/mvp-agent-blueprint.md16.5 kB
  • references/planning-and-goals.md8.6 kB
  • references/prompt-caching-and-cost.md11.6 kB
  • references/provider-api-patterns.md7.4 kB
  • references/security-observability.md19.0 kB
  • references/self-refining-recursive-harnesses.md24.7 kB
  • references/skills-and-connectors.md14.4 kB
  • references/source-links.md47.0 kB
  • references/system-prompts-instructions.md4.7 kB
  • references/tools-and-permissions.md14.1 kB
  • references/workflow-orchestration.md13.8 kB
  • assets/agents-best-practices-illustrations/02-workflow-orchestration-schema.svg6.5 kB

Not in the download

Not carried is a type a skill download does not hold. Take them from its source.

  • .gitignorenot carried
  • assets/agents-best-practices-illustrations/01-use-cases.jpgnot carried
  • icon.jpegnot carried
What is not in it

No dependencies and nothing executable: a skill is text the agent reads, so the download is 24 files — not the whole of its source: 3 files are left out. They are listed under the files, with why. The MIT licence covers the templates and examples as well as the instructions.

Install

Installing copies the bundle into your project. Nothing runs at install time — the files sit on disk until the model reads them.

# Agents Best Practices · 106.2k tokens when loaded · macOS, Linux mkdir -p .claude/skills && t=$(mktemp -d) && curl -fsSL -o "$t/bundle.tar.gz" https://mcprush.com/api/skills/agents-best-practices/bundle.tar.gz && tar -xzf "$t/bundle.tar.gz" -C "$t" && [ -d "$t/agents-best-practices" ] && { [ ! -e .claude/skills/agents-best-practices ] || { mv .claude/skills/agents-best-practices "$t/.previous" && echo "Previous copy moved to $t/.previous"; }; } && mv "$t/agents-best-practices" .claude/skills/ && echo "Installed .claude/skills/agents-best-practices"
On Windows, or any OS with Node 20+
npx mcprush@latest skill add denissergeevitch/agents-best-practices

Windows PowerShell says 'running scripts is disabled on this system'? Run Set-ExecutionPolicy -Scope CurrentUser RemoteSigned once, or type npx.cmd instead of npx (codex.cmd, gemini.cmd, grok.cmd likewise). PowerShell 7 needs neither. Writes to .claude/skills/agents-best-practices/ in the current project. For every project instead, run mkdir -p ~/.claude/skills && t=$(mktemp -d) && curl -fsSL -o "$t/bundle.tar.gz" https://mcprush.com/api/skills/agents-best-practices/bundle.tar.gz && tar -xzf "$t/bundle.tar.gz" -C "$t" && [ -d "$t/agents-best-practices" ] && { [ ! -e ~/.claude/skills/agents-best-practices ] || { mv ~/.claude/skills/agents-best-practices "$t/.previous" && echo "Previous copy moved to $t/.previous"; }; } && mv "$t/agents-best-practices" ~/.claude/skills/ && echo "Installed ~/.claude/skills/agents-best-practices" (macOS, Linux) — or add --global to the npx line. The curl line replaces .claude/skills/agents-best-practices/ only after the download succeeds, so files left there by another skill of the same name, or by an older release, do not mix in. A copy already there is moved aside, not deleted, and the line prints where. Not in this download: 3 files of its source (the full list, and why). Take them from its source.

Which clients pick it up on their own

A skill is a folder of text. Most of these read a skills folder and pick it up without being told; the rest take the same folder another way — an upload in the app, a parameter on an API call — and then choose it by its description just the same.

Claude Code.claude/skills/
Claude DesktopCustomize › Skills
ChatGPTSkills › Create › Upload
Cursor.cursor/skills/
VS Code.github/skills/
Codex CLI.agents/skills/
Gemini CLI.gemini/skills/
Grok Build.grok/skills/
Microsoft CopilotSkills › Upload a skill
PerplexityComputer › Skills › Upload a skill
DeepSeek Harness.dsh/skills/
Zed.agents/skills/
Devin Desktop.devin/skills/
Windsurf (legacy).windsurf/skills/
OpenAI Agents SDKInstructions or sandbox Skills
HTTP / APIa request parameter
This release
Version1.13.0
Publishedno release date on file
PriceFree
Referencedenissergeevitch/agents-best-practices

Versions

v1.13.0 is what is on the shelf; no release here carries a date. Instructions change more often than APIs do — a skill can be rewritten entirely without anything it depends on moving.

v1.13.0
  • No earlier releases have been published to the marketplace.
Pinning

The install command always fetches the release that is current the day you run it — v1.13.0 today — and cannot ask for an earlier one. The copy on your disk does not change until you run it again.

Reviews

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Who can post

Anybody with an account, one review each. It carries the version that was current when you wrote it, and the publisher may reply once.

Who wrote it

DE
DenisSergeevitch

Publishes on mcprush.

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