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A5c AI/Planning Design — measured AI agent skill | DecimalAI

a5c-ai/planning-design

SkillScore22Maintained

Design technical architecture, select technology stack, and define implementation strategy from specifications and constitution constraints.

by a5c-ai

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

Automatic

Coding pack

decimalai skills pull a5c-ai-planning-design

Get this skill — curl · raw file

curl -fsSL https://app.decimal.ai/s/a5c-ai-planning-design/SKILL.md

Raw file: /s/a5c-ai-planning-design/SKILL.md ↗ · machine-readable summary at /s/a5c-ai-planning-design.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

23 test cases from the publisher’s eval.yaml · each run twice on gemini-3.6-flash — with the skill injected, then without · last run 9d ago

Yes — +22% lift-7% tokens0% turns22% of whole cases pass with skill (5/23)

Test case	Without → With	Effect	Δ tokens	Δ turns
case-01	✗→✓	▲ Improved	-27%	0%
case-09	✗→✓	▲ Improved	-26%	0%
case-10	✗→✓	▲ Improved	-52%	0%
case-11	✗→✓	▲ Improved	-72%	0%
case-23	✗→✓	▲ Improved	-74%	0%

Showing 5 of 23 cases

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v4 — 7/31/2026

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

a5c-ai / babysitter

library/methodologies/spec-kit/skills/planning-design/SKILL.md

View on GitHub ↗

License MITImported 7/31/2026Version v1

Skill contents

SKILL.md

When evaluating technology stack options for a feature
When designing system architecture for new components
When assessing implementation risks and defining mitigations

Key Principle

Architecture decisions must be traceable to specification requirements. Technology choices must comply with constitution constraints. Trade-offs must be documented for every significant decision.

Process

Assess technology stack - Evaluate options against constitution requirements
Design architecture - Components, interfaces, data model, integration points
Define strategy - Phases, milestones, testing strategy, deployment approach
Assess risks - Identify risks and define mitigations
Human review - Approve architecture and strategy before task breakdown

Tool Use

Invoke via babysitter process: methodologies/spec-kit/spec-kit-planning Full pipeline: methodologies/spec-kit/spec-kit-orchestrator

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