refactor(cli): change from env var injection to direct prompt concatenation

- Replace $PROTO/$TMPL environment variable injection with systemRules/roles direct concatenation
- Append rules to END of prompt instead of prepending
- Change prompt field name from RULES to CONSTRAINTS in all prompts
- Default to universal-rigorous-style template when --rule not specified
- Update all .claude documentation, agents, commands, and skills
- Add streaming_content type support for Gemini delta messages

Breaking: Prompts now use CONSTRAINTS field instead of RULES

.claude/agents/cli-discuss-agent.md

@@ -215,7 +215,7 @@ CONTEXT: @**/* | Memory: {ace_context_summary}
 
 EXPECTED: JSON with feasibility_score, findings, implementation_approaches, technical_concerns, code_locations
 
-RULES: $PROTO |
+CONSTRAINTS:
 - Specific file:line references
 - Quantify effort estimates
 - Concrete pros/cons

.claude/agents/cli-execution-agent.md

@@ -114,10 +114,10 @@ plan → planning/architecture-planning.txt | planning/task-breakdown.txt
 bug-fix → development/bug-diagnosis.txt
 ```
 
-**3. RULES Field**:
-- Use `--rule <template>` option to auto-load protocol + template as `$PROTO` and `$TMPL`
+**3. CONSTRAINTS Field**:
+- Use `--rule <template>` option to auto-load protocol + template (appended to prompt)
 - Template names: `category-function` format (e.g., `analysis-code-patterns`, `development-feature`)
-- NEVER escape: `\$`, `\"`, `\'` breaks variable expansion
+- NEVER escape: `\"`, `\'` breaks shell parsing
 
 **4. Structured Prompt**:
 ```bash
@@ -126,7 +126,7 @@ TASK: {specific_task_with_details}
 MODE: {analysis|write|auto}
 CONTEXT: {structured_file_references}
 EXPECTED: {clear_output_expectations}
-RULES: $PROTO $TMPL | {constraints}
+CONSTRAINTS: {constraints}
 ```
 
 ---
@@ -157,7 +157,7 @@ TASK: {task}
 MODE: analysis
 CONTEXT: @**/*
 EXPECTED: {output}
-RULES: $PROTO $TMPL
+CONSTRAINTS: {constraints}
 " --tool gemini --mode analysis --rule analysis-code-patterns --cd {dir}
 
 # Qwen fallback: Replace '--tool gemini' with '--tool qwen'

.claude/agents/cli-lite-planning-agent.md

@@ -106,7 +106,7 @@ EXPECTED:
 ## Time Estimate
 **Total**: [time]
 
-RULES: $PROTO $TMPL |
+CONSTRAINTS:
 - Follow schema structure from {schema_path}
 - Acceptance/verification must be quantified
 - Dependencies use task IDs

.claude/agents/cli-planning-agent.md

@@ -127,7 +127,7 @@ EXPECTED: Structured fix strategy with:
 - Fix approach ensuring business logic correctness (not just test passage)
 - Expected outcome and verification steps
 - Impact assessment: Will this fix potentially mask other issues?
-RULES: $PROTO $TMPL |
+CONSTRAINTS:
 - For {test_type} tests: {layer_specific_guidance}
 - Avoid 'surgical fixes' that mask underlying issues
 - Provide specific line numbers for modifications

.claude/agents/debug-explore-agent.md

@@ -105,7 +105,7 @@ TASK: • Analyze error pattern • Identify potential root causes • Suggest t
 MODE: analysis
 CONTEXT: @{affected_files}
 EXPECTED: Structured hypothesis list with priority ranking
-RULES: $PROTO $TMPL | Focus on testable conditions
+CONSTRAINTS: Focus on testable conditions
 " --tool gemini --mode analysis --cd {project_root}
 ```
 
@@ -213,7 +213,7 @@ EXPECTED:
 - Evidence summary
 - Root cause identification (if confirmed)
 - Next steps (if inconclusive)
-RULES: $PROTO $TMPL | Evidence-based reasoning only
+CONSTRAINTS: Evidence-based reasoning only
 " --tool gemini --mode analysis
 ```
 
@@ -271,7 +271,7 @@ TASK:
 MODE: write
 CONTEXT: @{affected_files}
 EXPECTED: Working fix that addresses root cause
-RULES: $PROTO $TMPL | Minimal changes only
+CONSTRAINTS: Minimal changes only
 " --tool codex --mode write --cd {project_root}
 ```
 

.claude/agents/doc-generator.md

@@ -70,7 +70,7 @@ The agent supports **two execution modes** based on task JSON's `meta.cli_execut
    CONTEXT: @**/* ./src/modules/auth|code|code:5|dirs:2
    ./src/modules/api|code|code:3|dirs:0
    EXPECTED: Documentation files in .workflow/docs/my_project/src/modules/
-   RULES: $PROTO $TMPL | Mirror source structure
+   CONSTRAINTS: Mirror source structure
    " --tool gemini --mode write --rule documentation-module --cd src/modules
    ```
 
@@ -216,7 +216,7 @@ Before completion, verify:
 {
   "step": "analyze_module_structure",
   "action": "Deep analysis of module structure and API",
-  "command": "ccw cli -p \"PURPOSE: Document module comprehensively\nTASK: Extract module purpose, architecture, public API, dependencies\nMODE: analysis\nCONTEXT: @**/* System: [system_context]\nEXPECTED: Complete module analysis for documentation\nRULES: $PROTO $TMPL\" --tool gemini --mode analysis --rule documentation-module --cd src/auth",
+  "command": "ccw cli -p \"PURPOSE: Document module comprehensively\nTASK: Extract module purpose, architecture, public API, dependencies\nMODE: analysis\nCONTEXT: @**/* System: [system_context]\nEXPECTED: Complete module analysis for documentation\nCONSTRAINTS: Mirror source structure\" --tool gemini --mode analysis --rule documentation-module --cd src/auth",
   "output_to": "module_analysis",
   "on_error": "fail"
 }

.claude/agents/issue-queue-agent.md

@@ -87,7 +87,7 @@ TASK: • Detect file conflicts (same file modified by multiple solutions)
 MODE: analysis
 CONTEXT: @.workflow/issues/solutions/**/*.jsonl | Solution data: \${SOLUTIONS_JSON}
 EXPECTED: JSON array of conflicts with type, severity, solutions, recommended_order
-RULES: $PROTO | Severity: high (API/data) > medium (file/dependency) > low (architecture)
+CONSTRAINTS: Severity: high (API/data) > medium (file/dependency) > low (architecture)
 " --tool gemini --mode analysis --cd .workflow/issues
 ```