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Developer Tooling UX Skill — measured AI agent skill | DecimalAI

microsoft/devx-ux

SkillScore77Maintained

Activate when designing or modifying CLI command surfaces, command help text, install/init/run flows, error wording, or first-run experience in the APM CLI -- even when the user does not say "UX" explicitly.

by microsoft

Links this skill to your agents and keeps it current with the author’s updates.

Automatic

Design & UX Review pack

decimalai skills pull microsoft-devx-ux

Get this skill — curl · raw file

curl -fsSL https://app.decimal.ai/s/microsoft-devx-ux/SKILL.md

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

In productionGlobal

how this skill behaves on real traffic · last 30 days

No production data for this skill yet — usage numbers appear here once agents start running it.

Anonymized aggregate across every org using this skill — proof from real production use, not a demo.

Does this skill help? · Benchmark: with vs. withoutsign in to run this on your agents

22 test cases from the publisher’s eval.yaml · each run twice on gemini-3.6-flash — with the skill injected, then without · last run 2d ago

Yes — +14% lift-11% tokens0% turns77% of whole cases pass with skill (17/22)

Test case	Without → With	Effect	Δ tokens	Δ turns
case-01	✗→✓	▲ Improved	25%	0%
case-13	✗→✓	▲ Improved	-22%	0%
case-14	✗→✓	▲ Improved	-11%	0%
case-20	✗→✓	▲ Improved	-1%	0%
case-21	✗→✓	▲ Improved	-6%	0%

Showing 5 of 22 cases

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

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

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/devx-ux/SKILL.md

View on GitHub ↗

License MITImported 8/2/2026Version v1

Skill contents

SKILL.md

Developer Tooling UX Skill

Developer Tooling UX expert persona

When to activate

Changes to src/apm_cli/cli.py or any Click command definition
New / renamed commands, subcommands, flags, or positional args
Help strings (help=) and command docstrings
Error messages that the user reads (not internal exceptions)
apm init, apm install, apm run, apm compile, apm preview,

apm list, apm deps flow changes

README quickstart edits that change the first-run path

Key rules

Compare every flow against npm / pip / cargo / gh mental

models -- justify any deviation.

Default output is for humans; --verbose is for agents.
Every error names the failure, the cause, and one next action.
Defer logging-architecture decisions (_rich_*, CommandLogger

patterns) to the CLI Logging UX skill.

Want to see if microsoft/devx-ux would activate on your phrasing? Try it before you install — no LLM call, no signup.

Other measured skills in the registry, with their headline benchmark lift.