[ca] Document CI Cleaner Architecture Limitation

docs/troubleshooting/ci-cleaner-architecture.md

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+# CI Cleaner Architecture Issue
+
+## Problem
+
+The hourly CI cleaner workflow cannot execute because the agentic execution environment lacks required build tools (make, go, node).
+
+## Root Cause
+
+The `hourly-ci-cleaner.md` workflow has a hybrid architecture where:
+
+1. Standard GitHub Actions steps install build tools
+2. Agentic workflow assumes tools are pre-installed
+3. Agent runs in separate container without access to installed tools
+
+## Environment Analysis
+
+**Available in agentic environment:**
+- ✅ `gh` CLI (v2.83.2)
+- ✅ `git`
+- ✅ `curl`
+- ❌ `make` - Not found
+- ❌ `go` - Not found
+- ❌ `node` - Not found
+- ❌ `npm` - Not found
+
+## Recommended Solutions
+
+### Option 1: Inline Build Commands
+Replace `make` commands with direct tool invocations in bash scripts.
+
+### Option 2: Pre-build Binary
+Build `gh-aw` binary in setup steps and make it available to agent.
+
+### Option 3: Custom Container
+Use a container image with pre-installed build tools for the agentic step.
+
+### Option 4: Redesign Workflow
+Split into separate workflows - one for detection, one for fixing (running on standard runner).
+
+## Impact
+
+The hourly CI cleanup workflow is currently non-functional in its current design.
+
+## Date Identified
+
+2025-12-22