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Python Architecture Skill · microsoft | DecimalAI

codingby microsoft

Python Architecture Skill

microsoft/python-architecture

Source microsoft/apm ↗License MIT

Activate when creating new modules, refactoring class hierarchies, introducing design patterns, or making changes spanning 3+ files in the APM CLI codebase.

SkillScore86Maintained

Automatic

Coding pack

Last verified 8/7/2026

What it changes

Passed 19 of 22 test cases with the skill, and 5 of 22 without it.

Without skill23%

With skill86%

Checks it passed that the model alone missed

Extends AuthResolver host_providers
Delegates credential lookup to AuthResolver
Requires a regression test for the downloader

and 13 more in the full report

14 fixed5 passed either way3 still failing0 broke

Pass-rate lift: +64 pp
Tokens: -30%
Agent turns: 0%
Response time: -42%

Model gemini-3.6-flashMeasured 8/7/2026v119 of 22 cases passed with skill

Tokens, turns and time describe resource use, not a dollar price.

Use this skill

Save it into your project's skills folder. Claude Code picks it up in its next session.

curl -fsSL --create-dirs -o .claude/skills/microsoft-python-architecture/SKILL.md https://app.decimal.ai/s/microsoft-python-architecture/SKILL.md

Want it pinned and updatable? pip install "decimalai>=0.15", then decimalai skills add microsoft-python-architecture, and start Claude Code with claude --plugin-dir "$(git rev-parse --show-toplevel)/.agents"

1 · One-time — install the CLI (docs ↗)

pip install "decimalai>=0.15"

2 · Get the skill — writes .agents/skills/microsoft-python-architecture/ and pins it in .decimal/skills.lock

decimalai skills add microsoft-python-architecture

No CLI? Get the same file — curl · raw file

curl -fsSL --create-dirs -o .claude/skills/microsoft-python-architecture/SKILL.md https://app.decimal.ai/s/microsoft-python-architecture/SKILL.md

Raw file: /s/microsoft-python-architecture/SKILL.md ↗ · machine-readable summary at /s/microsoft-python-architecture.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

One of 14 test cases the skill fixed. Same model, same prompt, with and without the skill.

1 of 14

Prompt

Where should new static boundary rules be added when locking down modular boundaries in `src/apm_cli/`?

What was checked, without and with the skill
Checked	Without skill	With skill
Specifies script path as scripts/lint-architecture-boundaries.sh	Missed	Passed

case-15 · gemini-3.6-flash · 8/7/2026 · answers are capped and redacted

What's inside

The instructions your model reads when the skill loads.

SKILL.md20 linessingle file

Python Architecture Skill

Python architect persona

When to activate

Creating new Python modules or packages under src/apm_cli/
Refactoring class hierarchies or introducing base classes
Changes that touch 3+ files with shared logic patterns
Introducing new design patterns (Strategy, Observer, etc.)
Cross-cutting concerns (logging, auth, error handling)
Performance-sensitive paths (parallel downloads, large manifests)

Key rules

Follow existing patterns (BaseIntegrator, CommandLogger, AuthResolver) before inventing new ones
Prefer composition over deep inheritance
Push shared logic into base classes, not duplicated across siblings
One canonical owner per decision: route through the existing authority (target_catalog, AuthResolver/host_providers, runtime registry, CommandLogger, CompiledOutputWriter, deployment_ledger, install-outcome, neutral hook IR, BaseIntegrator); extend it, never fork it. Full rule: .apm/instructions/architecture.instructions.md
Lock every centralization with a dual guardrail: a regression test plus a static check in scripts/lint-architecture-boundaries.sh

Track record

Benchmark

19 / 22

test cases passed, vs 5 / 22 without

Adoption

Users: 0
Times used: 0

Safety and source details

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v4 — 8/2/2026

View 15 scanner checks

live_secretremote_code_executionreverse_shelldata_exfiltrationssrf_metadataagent_snoopinganti_refusaldestructive_commandsobfuscated_unicodeunicode_homoglyphopaque_blobsuspicious_urltool_overreachtrigger_abuseprompt_injection_phrasing

IntentSafe

LLM judge · does the skill do what it claims

ContentClean

LLM judge · policy & harmful-content review

Source

Imported

microsoft / apm

.apm/skills/python-architecture/SKILL.md

View on GitHub ↗

License MITImported 8/2/2026Version v1

Other skills for the same job

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python-architecture[Python architect persona](../../../.apm/agents/python-architect.agent.md)Near-identical description+68 pp pass-rate lift

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See it in action

What's inside

Python Architecture Skill

When to activate

Key rules

Track record

Benchmark

Adoption

SkillSafety

Source

Other skills for the same job

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