igorganapolsky/thumbgate/aws-strands-harness-not-clone

Claude Code and agent skill by igorganapolsky/thumbgate

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AWS Strands Harness (The New Stack 2026-10 / Marc Brooker) is an agent runtime architecture, not a ThumbGate clone. Steal the three context-management defaults (output shunting <= 350 lines, 75% compaction threshold, in-loop recovery) and inject ThumbGate's PreToolUse diode. Never vendor Bedrock-only dependencies. Slash: /aws-strands-harness-not-clone.

Install

npx vskill@latest install igorganapolsky/thumbgate/aws-strands-harness-not-clone

SKILL.md

AWS Strands Harness — FORMAT Steal, Not Clone

Goal

Provide fail-closed pre-action governance and token-shunted output bounds for agents running on AWS Strands Harness (@strands-agents/harness or strands-harness), capturing the 45% (and 77% Terminal-Bench 2.1) token savings while preventing destructive tool actions.

Constraints

NEVERALWAYS
Clone or install Bedrock-only proprietary packagesUse decoupled providers (Bedrock, Anthropic, OpenAI, Ollama)
Allow un-shunted raw tool returns (> 350 lines / 16KB)Truncate with evaluateOutputShunt offset markers
Drop durable prevention rules during context compactionPin ThumbGate rules across 75% compaction threshold
Crash the agent loop on context overflowRecover in-loop by pruning non-pinned conversational history
Execute mutating shell/file tools without governanceRun ThumbGate PreToolUse diode before dispatch
Claim 77% savings without citing Terminal-Bench 2.1Ground benchmarks in measured tool-output reduction

HARD fail closed. REFUSE un-gated autonomous execution.

Reference

  • The New Stack (2026-10): AWS open-sources an AI agent it says is 45% cheaper than Claude Code and Codex
  • scripts/strands-harness-doctor.js
  • adapters/strands/strands-middleware.js
  • adapters/strands/config.json
  • adapters/strands/STRANDS.md
  • docs/agents/aws-strands-harness.md

Usage

bash
# Audit Strands Harness compliance
node scripts/strands-harness-doctor.js
 
# Machine-readable output
node scripts/strands-harness-doctor.js --json
 
# Architectural map
node scripts/strands-harness-doctor.js --map-only
 
# CI Gate check
node scripts/strands-harness-doctor.js --check

Security

  • Security scanPassed, 90 of 100Pattern checks on the skill's files.
  • Model reviewPassed

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