Setup RailPose3D harness (Planner/Generator/Evaluator)

Name the project RailPose3D and stand up a multi-agent harness
following the Anthropic harness-design blog principles
(decomposition, separation of concerns, file-based handoff,
sprint contracts, context-reset over compaction).

- CLAUDE.md / PLAN.md / PROGRESS.md as the file-based handoff
  surface; every agent must read PLAN+PROGRESS before acting.
- 7 sub-agents under .claude/agents/: plan-architect (Planner),
  pole-detector-builder, rail-detector-builder, triangulation-
  builder, data-pipeline-builder (Generators), module-evaluator
  (Evaluator), dataset-explorer (read-only helper).
- 6 skills under .claude/skills/: /start /sprint /eval /progress
  /handoff /contract.
- SessionStart and Stop hooks to inject the PLAN/PROGRESS
  briefing and remind about PROGRESS.md updates.
- docs/plan.md captures the user-approved detailed plan;
  docs/research.md is the prior tech survey.
- .gitignore excludes data/, .usage/, model checkpoints, and
  local Claude overrides.

Tracking: closes #1

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.claude/settings.json

@@ -0,0 +1,60 @@
+{
+  "permissions": {
+    "allow": [
+      "mcp__gitea__get_me",
+      "mcp__gitea__issue_write"
+    ]
+  },
+  "hooks": {
+    "SessionStart": [
+      {
+        "hooks": [
+          {
+            "type": "command",
+            "command": "bash ./.claude/hooks/session_briefing.sh",
+            "timeout": 5
+          }
+        ]
+      }
+    ],
+    "UserPromptSubmit": [
+      {
+        "hooks": [
+          {
+            "type": "command",
+            "command": "t=$(mktemp);cat>\"$t\";e=./.claude/hooks/token-usage/claude-hook.exe;[ -x \"$e\" ] && \"$e\" session-context \"$t\";rm -f \"$t\"",
+            "timeout": 5
+          }
+        ]
+      }
+    ],
+    "Stop": [
+      {
+        "hooks": [
+          {
+            "type": "command",
+            "command": "t=$(mktemp);cat>\"$t\";e=./.claude/hooks/token-usage/claude-hook.exe;[ -x \"$e\" ] && \"$e\" stop-record \"$t\";rm -f \"$t\"",
+            "timeout": 5
+          },
+          {
+            "type": "command",
+            "command": "bash ./.claude/hooks/stop_progress_reminder.sh",
+            "timeout": 3
+          }
+        ]
+      }
+    ],
+    "PostToolUse": [
+      {
+        "matcher": "Bash",
+        "hooks": [
+          {
+            "type": "command",
+            "command": "t=$(mktemp);cat>\"$t\";e=./.claude/hooks/token-usage/claude-hook.exe;[ -x \"$e\" ] && \"$e\" aptabase-commit \"$t\";rm -f \"$t\"",
+            "timeout": 15
+          }
+        ]
+      }
+    ]
+  }
+}