feat: add context:sync tasks

.context/skills/go-patterns.md

@@ -0,0 +1,37 @@
+# Skill: Go project patterns
+
+## New endpoint checklist
+1. Define request/response types in `types.go`
+2. Write handler in `handlers.go` using `http.HandlerFunc`
+3. Add route in `routes.go`
+4. Write table-driven test in `handlers_test.go`
+5. Run `task check` before committing
+
+## Error handling pattern
+```go
+if err != nil {
+    return fmt.Errorf("descriptiveOperation: %w", err)
+}
+```
+Never log and return — do one or the other.
+
+## HTMX response pattern
+```go
+func (h *Handler) ListItems(w http.ResponseWriter, r *http.Request) {
+    items, err := h.store.List(r.Context())
+    if err != nil {
+        http.Error(w, "failed to list items", http.StatusInternalServerError)
+        return
+    }
+    if r.Header.Get("HX-Request") == "true" {
+        h.templates.Render(w, "items/_list", items)
+        return
+    }
+    h.templates.Render(w, "items/index", items)
+}
+```
+
+## Dependency policy
+- Prefer stdlib: `net/http`, `encoding/json`, `database/sql`
+- Allowed without justification: `testify`, `slog`, `templ`, `sqlc`
+- Needs justification in commit message: anything else

.context/skills/htmx-patterns.md

@@ -0,0 +1,26 @@
+# Skill: HTMX patterns
+
+## Default attributes
+Always include on interactive elements:
+- `hx-indicator` for loading states
+- `hx-swap="innerHTML"` as default (explicit over implicit)
+- `hx-target` pointing to a specific ID, never `this` in production
+
+## Form pattern
+```html
+<form hx-post="/items" hx-target="#item-list" hx-swap="beforeend" hx-indicator="#spinner">
+  <input type="text" name="title" required>
+  <button type="submit">Add</button>
+  <span id="spinner" class="htmx-indicator">...</span>
+</form>
+```
+
+## Server-sent validation errors
+Return 422 with the error fragment, swap into the form's error container:
+```html
+hx-target-422="#form-errors"
+```
+
+## Prefer hypermedia over JSON
+If the endpoint returns data for display, return an HTML fragment.
+Only use JSON for machine-to-machine APIs or when a non-browser client needs it.

.skills/go-patterns/SKILL.md

@@ -0,0 +1,42 @@
+---
+name: go-patterns
+description: Go project patterns — endpoint checklist, error handling, HTMX responses, dependency policy. Use when writing Go code, adding endpoints, or reviewing Go PRs.
+---
+
+# Go project patterns
+
+## New endpoint checklist
+1. Define request/response types in `types.go`
+2. Write handler in `handlers.go` using `http.HandlerFunc`
+3. Add route in `routes.go`
+4. Write table-driven test in `handlers_test.go`
+5. Run `task check` before committing
+
+## Error handling pattern
+```go
+if err != nil {
+    return fmt.Errorf("descriptiveOperation: %w", err)
+}
+```
+Never log and return — do one or the other.
+
+## HTMX response pattern
+```go
+func (h *Handler) ListItems(w http.ResponseWriter, r *http.Request) {
+    items, err := h.store.List(r.Context())
+    if err != nil {
+        http.Error(w, "failed to list items", http.StatusInternalServerError)
+        return
+    }
+    if r.Header.Get("HX-Request") == "true" {
+        h.templates.Render(w, "items/_list", items)
+        return
+    }
+    h.templates.Render(w, "items/index", items)
+}
+```
+
+## Dependency policy
+- Prefer stdlib: `net/http`, `encoding/json`, `database/sql`
+- Allowed without justification: `testify`, `slog`, `templ`, `sqlc`
+- Needs justification in commit message: anything else

.skills/htmx-patterns/SKILL.md

@@ -0,0 +1,31 @@
+---
+name: htmx-patterns
+description: HTMX conventions — default attributes, form patterns, validation errors, hypermedia-first API design. Use when writing HTMX templates or Go handlers that return HTML fragments.
+---
+
+# HTMX patterns
+
+## Default attributes
+Always include on interactive elements:
+- `hx-indicator` for loading states
+- `hx-swap="innerHTML"` as default (explicit over implicit)
+- `hx-target` pointing to a specific ID, never `this` in production
+
+## Form pattern
+```html
+<form hx-post="/items" hx-target="#item-list" hx-swap="beforeend" hx-indicator="#spinner">
+  <input type="text" name="title" required>
+  <button type="submit">Add</button>
+  <span id="spinner" class="htmx-indicator">...</span>
+</form>
+```
+
+## Server-sent validation errors
+Return 422 with the error fragment, swap into the form's error container:
+```html
+hx-target-422="#form-errors"
+```
+
+## Prefer hypermedia over JSON
+If the endpoint returns data for display, return an HTML fragment.
+Only use JSON for machine-to-machine APIs or when a non-browser client needs it.

Taskfile.yml

@@ -24,3 +24,14 @@ tasks:
       - golangci-lint run ./...
       - go vet ./...
       - go test ./... -race -count=1
+
+  context:sync:
+    desc: Regenerate all harness-specific context files
+    cmds:
+      - bash scripts/context-sync.sh
+  context:sync:claude:
+    cmds: [bash scripts/context-sync.sh claude]
+  context:sync:agents:
+    cmds: [bash scripts/context-sync.sh agents]
+  context:sync:cursor:
+    cmds: [bash scripts/context-sync.sh cursor]

scripts/context-sync.sh

@@ -0,0 +1,201 @@
+#!/usr/bin/env bash
+# Generates harness-specific context files from .context/PROJECT.md
+# Project-level script — run from a project directory.
+#
+# For Claude Code: generates project-only CLAUDE.md (it inherits root via tree walk)
+# For everything else: concatenates root AGENT.md + project PROJECT.md
+#
+# Usage: ./scripts/context-sync.sh [--force] [adapter...]
+# Task:  task context:sync
+#
+# Override root context: ROOT_CONTEXT=~/dev/.context/AGENT.md ./scripts/context-sync.sh
+
+set -euo pipefail
+
+# Parse --force flag and collect adapter names separately
+FORCE=false
+ADAPTERS=()
+for _arg in "$@"; do
+  case "$_arg" in
+    --force) FORCE=true ;;
+    *) ADAPTERS+=("$_arg") ;;
+  esac
+done
+
+PROJECT_FILE=".context/PROJECT.md"
+
+# Walk up to find root .context/AGENT.md
+find_root_context() {
+  local dir
+  dir="$(pwd)"
+  while [ "$dir" != "/" ]; do
+    dir="$(dirname "$dir")"
+    if [ -f "$dir/.context/AGENT.md" ]; then
+      echo "$dir/.context/AGENT.md"
+      return
+    fi
+  done
+  echo ""
+}
+
+ROOT_CONTEXT="${ROOT_CONTEXT:-$(find_root_context)}"
+
+if [ ! -f "$PROJECT_FILE" ]; then
+  echo "Error: $PROJECT_FILE not found. Are you in a project root?"
+  exit 1
+fi
+
+# Pre-flight: reject unfilled {{...}} placeholders unless --force
+if [ "$FORCE" = false ]; then
+  _placeholders=$(grep -n '{{[^}]*}}' "$PROJECT_FILE" 2>/dev/null || true)
+  if [ -n "$_placeholders" ]; then
+    echo "Error: unfilled placeholders in $PROJECT_FILE:" >&2
+    while IFS= read -r _match; do
+      _lineno="${_match%%:*}"
+      _content="${_match#*:}"
+      _token=$(printf '%s' "$_content" | grep -o '{{[^}]*}}' | head -1)
+      echo "  $PROJECT_FILE:$_lineno: unfilled placeholder $_token" >&2
+    done <<< "$_placeholders"
+    echo "" >&2
+    echo "Fill these placeholders, then re-run: task context:sync" >&2
+    echo "To bypass validation: bash scripts/context-sync.sh --force" >&2
+    exit 1
+  fi
+fi
+
+if [ -n "$ROOT_CONTEXT" ] && [ -f "$ROOT_CONTEXT" ]; then
+  echo "  Root context: $ROOT_CONTEXT"
+else
+  echo "  No root AGENT.md found (project context only)"
+fi
+
+# Emit root context + separator
+root_block() {
+  if [ -n "$ROOT_CONTEXT" ] && [ -f "$ROOT_CONTEXT" ]; then
+    cat "$ROOT_CONTEXT"
+    echo ""
+    echo "---"
+    echo ""
+  fi
+}
+
+# ── Claude Code ──────────────────────────────────────────────
+# Claude Code walks up the tree — it finds ~/dev/CLAUDE.md automatically.
+# Project-level CLAUDE.md only needs project-specific context.
+generate_claude() {
+  cat "$PROJECT_FILE" > CLAUDE.md
+  echo "  → CLAUDE.md (project-only; Claude Code inherits root)"
+}
+
+# ── AGENTS.md (Crush, Pi, Antigravity) ──────────────────────
+# These tools read AGENTS.md from cwd but don't walk up.
+# Concatenate root + project.
+generate_agents() {
+  { root_block; cat "$PROJECT_FILE"; } > AGENTS.md
+  echo "  → AGENTS.md (root + project; Crush, Pi, Antigravity)"
+}
+
+# ── Cursor ───────────────────────────────────────────────────
+generate_cursor() {
+  {
+    echo "# Cursor rules — auto-generated"
+    echo "# Do not edit. Run: task context:sync"
+    echo ""
+    root_block
+    cat "$PROJECT_FILE"
+  } > .cursorrules
+  echo "  → .cursorrules (root + project)"
+}
+
+# ── Aider ────────────────────────────────────────────────────
+generate_aider() {
+  { root_block; cat "$PROJECT_FILE"; } > .aider.conventions.md
+  if [ ! -f .aider.conf.yml ]; then
+    cat > .aider.conf.yml << 'YAML'
+read: .aider.conventions.md
+auto-commits: false
+YAML
+  fi
+  echo "  → .aider.conventions.md (root + project)"
+}
+
+# ── Generic system prompt (Open WebUI, Mods, etc.) ──────────
+generate_system_prompt() {
+  {
+    echo "You are a coding assistant working on a specific project."
+    echo "Follow all conventions from both the root agent context and project context."
+    echo ""
+    echo "---"
+    echo ""
+    root_block
+    cat "$PROJECT_FILE"
+    echo ""
+    echo "---"
+  } > .context/system-prompt.txt
+  echo "  → .context/system-prompt.txt (root + project)"
+}
+
+# ── MCP config ───────────────────────────────────────────────
+generate_mcp() {
+  # Ensure baseline file exists with project-specific knowledge server
+  if [ ! -f .context/mcp.json ]; then
+    cat > .context/mcp.json << 'JSON'
+{
+  "mcpServers": {
+    "knowledge": {
+      "url": "http://localhost:3100/mcp",
+      "description": "Project knowledge base — vector + graph retrieval"
+    }
+  }
+}
+JSON
+  fi
+
+  # Merge root mcp-servers.json if found alongside root AGENT.md
+  local root_mcp=""
+  if [ -n "$ROOT_CONTEXT" ] && [ -f "$ROOT_CONTEXT" ]; then
+    local candidate
+    candidate="$(dirname "$ROOT_CONTEXT")/mcp-servers.json"
+    [ -f "$candidate" ] && root_mcp="$candidate"
+  fi
+
+  if [ -z "$root_mcp" ]; then
+    echo "  → .context/mcp.json (exists, no root mcp-servers.json found)"
+    return
+  fi
+
+  # Root servers take precedence over project entries on key conflict
+  local root_servers count updated
+  root_servers=$(jq '.servers' "$root_mcp")
+  count=$(printf '%s' "$root_servers" | jq 'keys | length')
+  updated=$(jq --argjson root "$root_servers" \
+    '.mcpServers = (.mcpServers + $root)' \
+    .context/mcp.json)
+  printf '%s\n' "$updated" > .context/mcp.json
+  echo "  → .context/mcp.json (merged $count root servers)"
+}
+
+echo "Syncing project context from $PROJECT_FILE..."
+
+if [ ${#ADAPTERS[@]} -eq 0 ]; then
+  generate_claude
+  generate_agents
+  generate_cursor
+  generate_aider
+  generate_system_prompt
+  generate_mcp
+else
+  for adapter in "${ADAPTERS[@]}"; do
+    case "$adapter" in
+      claude)  generate_claude ;;
+      agents)  generate_agents ;;
+      cursor)  generate_cursor ;;
+      aider)   generate_aider ;;
+      prompt|system|openwebui|owui|generic) generate_system_prompt ;;
+      mcp)     generate_mcp ;;
+      *) echo "Unknown adapter: $adapter" >&2; exit 1 ;;
+    esac
+  done
+fi
+
+echo "Done."