chore(skills): move the project skills from .opencode/skills to .agent/skills

Maintainer decision 2026-10-02 (no symlink). AGENTS.md, README, the two spec
docs, the kiro-spec-batch skill and the provenance ignore list are repointed;
the OpenCode plugin package.json stays under .opencode.

Co-Authored-By: Claude Fable 5.1 <[email protected]>
Claude-Session: https://claude.ai/code/session_01EmM1j46qgKMh3zqD1QMwEo

.agent/skills/kiro-spec-design/rules/design-discovery-light.md

@@ -0,0 +1,49 @@
+# Light Discovery Process for Extensions
+
+## Objective
+Quickly analyze existing system and integration requirements for feature extensions.
+
+## Focused Discovery Steps
+
+### 1. Extension Point Analysis
+**Identify Integration Approach**:
+- Locate existing extension points or interfaces
+- Determine modification scope (files, components)
+- Check for existing patterns to follow
+- Identify backward compatibility requirements
+
+### 2. Dependency Check
+**Verify Compatibility**:
+- Check version compatibility of new dependencies
+- Validate API contracts haven't changed
+- Ensure no breaking changes in pipeline
+
+### 3. Quick Technology Verification
+**For New Libraries Only**:
+- Use WebSearch for official documentation
+- Verify basic usage patterns
+- Check for known compatibility issues
+- Confirm licensing compatibility
+- Record key findings in `research.md` (technology alignment section)
+
+### 4. Integration Risk Assessment
+**Quick Risk Check**:
+- Impact on existing functionality
+- Performance implications
+- Security considerations
+- Testing requirements
+
+## When to Escalate to Full Discovery
+Switch to full discovery if you find:
+- Significant architectural changes needed
+- Complex external service integrations
+- Security-sensitive implementations
+- Performance-critical components
+- Unknown or poorly documented dependencies
+
+## Output Requirements
+- Clear integration approach (note boundary impacts in `research.md`)
+- List of files/components to modify
+- New dependencies with versions
+- Integration risks and mitigations
+- Testing focus areas