feat(task-018): add role-based context selection

.rdb/session-log.jsonl

@@ -36,3 +36,8 @@
 {"timestamp": "2026-06-02T16:29:43.405985+00:00", "event_type": "command", "target": "rdb next", "details": {}}
 {"timestamp": "2026-06-02T16:29:59.879010+00:00", "event_type": "command", "target": "rdb prompt", "details": {}}
 {"timestamp": "2026-06-02T16:47:40.958013+00:00", "event_type": "command", "target": "rdb status", "details": {}}
+{"timestamp": "2026-06-02T16:57:02.286495+00:00", "event_type": "command", "target": "rdb status", "details": {}}
+{"timestamp": "2026-06-02T16:57:05.774698+00:00", "event_type": "command", "target": "rdb next", "details": {}}
+{"timestamp": "2026-06-02T16:57:29.853052+00:00", "event_type": "command", "target": "rdb prompt", "details": {}}
+{"timestamp": "2026-06-02T17:05:41.754949+00:00", "event_type": "command", "target": "rdb status", "details": {}}
+{"timestamp": "2026-06-02T17:07:48.597850+00:00", "event_type": "command", "target": "rdb status", "details": {}}

TASKS.md

@@ -309,7 +309,7 @@ Definition of Done:
 
 ## TASK-018 — Role-based context selection
 
-Status: Todo
+Status: Done
 
 Role: Implementation Agent
 

src/rdb_discovery.egg-info/PKG-INFO

@@ -11,9 +11,11 @@ Requires-Dist: pytest>=8.0.0; extra == "dev"
 
 # rdb-discovery
 
-A small CLI-first tool for repeatable software project discovery and delivery.
+A small CLI-first tool that helps you generate and maintain useful project context files for AI-assisted development.
 
-It creates markdown files that help humans and AI coding agents understand:
+## Purpose
+
+rdb-discovery exists to make it easier for humans and AI coding agents to understand:
 
 - what is being built
 - why it exists
@@ -21,6 +23,20 @@ It creates markdown files that help humans and AI coding agents understand:
 - what task should be done next
 - what stage the project is currently in
 
+The tool creates and manages a set of markdown files — your project's source-of-truth context.
+
+## Core workflow
+
+1. **Ask discovery questions** — `rdb discover` captures answers about the product, architecture, risks, and open questions.
+2. **Capture answers** — Structured responses are stored in `context/discovery-log.md` alongside confidence scores and follow-ups.
+3. **Generate context files** — `rdb init` creates standardised project files (`product-brief.md`, `architecture.md`, `decisions.md`, etc.).
+4. **Support agent implementation** — `rdb prompt` produces ready-to-paste implementation prompts for Claude Code or Cline, and `rdb start` / `rdb complete` manage task lifecycles.
+
+## Support features (not the product)
+
+- **Telemetry** records structured agent activity events in `.rdb/session-log.jsonl`. It enables future analysis but is not the main offering.
+- **Guardrails** detect agent stalls, repeated reads, and inconsistent state to keep projects on track. They support the workflow but are secondary.
+
 ## Install for local development
 
 ```bash
@@ -32,23 +48,43 @@ pip install -e '.[dev]'
 ## Commands
 
 ```bash
-rdb init
-rdb discover
-rdb status
-rdb next
-rdb start TASK-001
-rdb complete TASK-001
-rdb handoff
+rdb init             # Create standard project structure and context files
+rdb discover         # Ask 10 core discovery questions, record answers
+rdb guardrails       # Check for agent stalls and state inconsistencies
+rdb prompt           # Generate implementation prompt for the next task
+rdb start TASK-001   # Mark a task as in progress
+rdb complete TASK-001# Mark a task as done
+rdb status           # Show current stage and active task
+rdb next             # Print the next task to work on
+rdb handoff          # Generate agent handoff notes
 ```
 
 ## Bootstrap workflow
 
 1. Run `rdb init`
 2. Run `rdb discover`
-3. Run `rdb status`
-4. Run `rdb next`
-5. Give the next task to Claude Code or Cline
-6. Commit after each completed task
+3. Review `rdb status` and `rdb next`
+4. Give the next prompt to Claude Code or Cline via `rdb prompt`
+5. Commit after each completed task
+
+## Project structure
+
+`rdb init` creates the following files (skips existing ones):
+
+- context/discovery-log.md
+- context/product-brief.md
+- context/architecture.md
+- context/decisions.md
+- context/risks.md
+- context/assumptions.md
+- context/open-questions.md
+- context/repository-context.md
+- TASKS.md
+- TEST_PLAN.md
+- RUN_LOG.md
+- PROJECT_STATE.md
+- AGENT_HANDOFF.md
+- .rdb/project.json
 
 ## Principle
 

src/rdb_discovery.egg-info/SOURCES.txt

@@ -3,9 +3,11 @@ pyproject.toml
 src/rdb_discovery/__init__.py
 src/rdb_discovery/cli.py
 src/rdb_discovery/discovery.py
+src/rdb_discovery/guardrails.py
 src/rdb_discovery/handoff.py
 src/rdb_discovery/status.py
 src/rdb_discovery/tasks.py
+src/rdb_discovery/telemetry.py
 src/rdb_discovery/templates.py
 src/rdb_discovery.egg-info/PKG-INFO
 src/rdb_discovery.egg-info/SOURCES.txt
@@ -13,5 +15,10 @@ src/rdb_discovery.egg-info/dependency_links.txt
 src/rdb_discovery.egg-info/entry_points.txt
 src/rdb_discovery.egg-info/requires.txt
 src/rdb_discovery.egg-info/top_level.txt
+tests/test_discovery.py
+tests/test_guardrails.py
+tests/test_prompt.py
+tests/test_status.py
 tests/test_tasks.py
+tests/test_telemetry.py
 tests/test_templates.py

src/rdb_discovery/tasks.py

@@ -109,7 +109,7 @@ def update_task_status(root: Path, task_id: str, new_status: str) -> bool:
     return False
 
 
-CONTEXT_FILES_TO_READ = [
+DEFAULT_CONTEXT_FILES = [
     "README.md",
     "TASKS.md",
     "PROJECT_STATE.md",
@@ -117,6 +117,38 @@ CONTEXT_FILES_TO_READ = [
     "context/agent-guidelines.md",
 ]
 
+ROLE_CONTEXT_FILES: dict[str, list[str]] = {
+    "Architecture Agent": [
+        "README.md",
+        "TASKS.md",
+        "PROJECT_STATE.md",
+        "context/architecture.md",
+        "context/product-brief.md",
+        "context/decisions.md",
+    ],
+    "Implementation Agent": [
+        "README.md",
+        "TASKS.md",
+        "PROJECT_STATE.md",
+        "AGENT_HANDOFF.md",
+        "context/agent-guidelines.md",
+        "CLAUDE.md",
+    ],
+    "Documentation Agent": [
+        "README.md",
+        "TASKS.md",
+        "PROJECT_STATE.md",
+        "AGENT_HANDOFF.md",
+        "context/agent-guidelines.md",
+        "TEST_PLAN.md",
+    ],
+}
+
+
+def _context_files_for_role(role: str) -> list[str]:
+    """Return the context file list for a given role, falling back to default."""
+    return ROLE_CONTEXT_FILES.get(role, DEFAULT_CONTEXT_FILES)
+
 TEST_CMD_SECTION_RE = re.compile(
     r"^##\s*Test Commands\s*\n([\s\S]*?)(?=^##|\Z)",
     re.MULTILINE,
@@ -186,6 +218,7 @@ def generate_agent_prompt(root: Path) -> str:
         return "No Todo task found."
 
     role_text, article = task.role(root)
+    context_files = _context_files_for_role(role_text)
 
     sections = [
         f"You are {article} {role_text.lower()}.",
@@ -194,13 +227,15 @@ def generate_agent_prompt(root: Path) -> str:
         "",
         "# Read these files first",
         "",
-        f"""- README.md
-- TASKS.md
-- PROJECT_STATE.md
-- AGENT_HANDOFF.md""",
-        "",
-        "- context/agent-guidelines.md",
-        "",
+    ]
+    for i, f in enumerate(context_files):
+        line = f"- {f}"
+        if i == len(context_files) - 1:
+            sections.append(line)
+        else:
+            sections.append(line)
+
+    sections.extend([
         "---",
         "",
         "# Task",
@@ -210,7 +245,7 @@ def generate_agent_prompt(root: Path) -> str:
         f"Status: {task.status}",
         "",
         f"Goal:\n{task.goal(root)}",
-    ]
+    ])
 
     gap = task.implementation_gap(root)
     if gap:

tests/test_prompt.py

@@ -322,3 +322,94 @@ def test_generate_agent_prompt_with_custom_role(tmp_path: Path) -> None:
     prompt = generate_agent_prompt(tmp_path)
 
     assert "You are a devops engineer." in prompt
+
+
+def test_architecture_agent_receives_architecture_context(tmp_path: Path) -> None:
+    (tmp_path / "TASKS.md").write_text(
+        "# TASKS\n\n"
+        "## TASK-001 — First\nStatus: Done\n\n"
+        "Goal: x.\n\n"
+        "## TASK-002 — Second\nStatus: Todo\n\n"
+        "Role: Architecture Agent\n"
+        "Goal: y.\n",
+        encoding="utf-8",
+    )
+
+    prompt = generate_agent_prompt(tmp_path)
+
+    assert "context/architecture.md" in prompt
+    assert "context/product-brief.md" in prompt
+    assert "context/decisions.md" in prompt
+
+
+def test_implementation_agent_receives_implementation_context(tmp_path: Path) -> None:
+    (tmp_path / "TASKS.md").write_text(
+        "# TASKS\n\n"
+        "## TASK-001 — First\nStatus: Done\n\n"
+        "Goal: x.\n\n"
+        "## TASK-002 — Second\nStatus: Todo\n\n"
+        "Role: Implementation Agent\n"
+        "Goal: y.\n",
+        encoding="utf-8",
+    )
+
+    prompt = generate_agent_prompt(tmp_path)
+
+    assert "AGENT_HANDOFF.md" in prompt
+    assert "context/agent-guidelines.md" in prompt
+    assert "CLAUDE.md" in prompt
+
+
+def test_documentation_agent_receives_documentation_context(tmp_path: Path) -> None:
+    (tmp_path / "TASKS.md").write_text(
+        "# TASKS\n\n"
+        "## TASK-001 — First\nStatus: Done\n\n"
+        "Goal: x.\n\n"
+        "## TASK-002 — Second\nStatus: Todo\n\n"
+        "Role: Documentation Agent\n"
+        "Goal: y.\n",
+        encoding="utf-8",
+    )
+
+    prompt = generate_agent_prompt(tmp_path)
+
+    assert "TEST_PLAN.md" in prompt
+    assert "AGENT_HANDOFF.md" in prompt
+
+
+def test_context_files_differ_by_role(tmp_path: Path) -> None:
+    (tmp_path / "TASKS.md").write_text(
+        "# TASKS\n\n"
+        "## TASK-001 — First\nStatus: Done\n\n"
+        "Goal: x.\n\n"
+        "## TASK-002 — Architect\nStatus: Todo\n\n"
+        "Role: Architecture Agent\n"
+        "Goal: y.\n",
+        encoding="utf-8",
+    )
+
+    prompt = generate_agent_prompt(tmp_path)
+
+    # Architecture role should have architecture-specific files
+    assert "context/architecture.md" in prompt
+
+
+def test_no_role_uses_default_context(tmp_path: Path) -> None:
+    """When no Role is set, the default file list is used (backward compatible)."""
+    (tmp_path / "TASKS.md").write_text(
+        "# TASKS\n\n"
+        "## TASK-001 — First\nStatus: Done\n\n"
+        "Goal: x.\n\n"
+        "## TASK-002 — Second\nStatus: Todo\n\n"
+        "Goal: y.\n",
+        encoding="utf-8",
+    )
+
+    prompt = generate_agent_prompt(tmp_path)
+
+    # Default files must still be present
+    assert "README.md" in prompt
+    assert "TASKS.md" in prompt
+    assert "PROJECT_STATE.md" in prompt
+    assert "AGENT_HANDOFF.md" in prompt
+    assert "context/agent-guidelines.md" in prompt