Neovim Implementation Skill

Thin wrapper that delegates Neovim implementation to neovim-implementation-agent subagent.

IMPORTANT: This skill implements the skill-internal postflight pattern. After the subagent returns, this skill handles all postflight operations (status update, artifact linking, git commit) before returning.

Context References

Reference (do not load eagerly):

•Path: .claude/context/core/formats/return-metadata-file.md - Metadata file schema
•Path: .claude/context/core/patterns/postflight-control.md - Marker file protocol
•Path: .claude/context/core/patterns/jq-escaping-workarounds.md - jq escaping patterns

Trigger Conditions

This skill activates when:

•Task language is "neovim"
•Implementation plan exists for the task
•Neovim configuration changes need to be applied

Execution Flow

Stage 1: Input Validation

Validate required inputs:

•task_number - Must be provided and exist in state.json
•plan_path - Implementation plan must exist

bash

# Lookup task
task_data=$(jq -r --argjson num "$task_number" \
  '.active_projects[] | select(.project_number == $num)' \
  specs/state.json)

# Validate exists
if [ -z "$task_data" ]; then
  return error "Task $task_number not found"
fi

# Extract fields
language=$(echo "$task_data" | jq -r '.language // "neovim"')
status=$(echo "$task_data" | jq -r '.status')
project_name=$(echo "$task_data" | jq -r '.project_name')

# Find plan file (use padded directory number)
padded_num=$(printf "%03d" "$task_number")
plan_path="specs/${padded_num}_${project_name}/plans/implementation-001.md"
if [ ! -f "$plan_path" ]; then
  return error "Plan not found: $plan_path"
fi

Stage 2: Preflight Status Update

Update task status to "implementing" BEFORE invoking subagent.

Update state.json:

bash

jq --arg ts "$(date -u +%Y-%m-%dT%H:%M:%SZ)" \
   --arg status "implementing" \
   --arg sid "$session_id" \
  '(.active_projects[] | select(.project_number == '$task_number')) |= . + {
    status: $status,
    last_updated: $ts,
    session_id: $sid
  }' specs/state.json > /tmp/state.json && mv /tmp/state.json specs/state.json

Update TODO.md: Use Edit tool to change status marker to [IMPLEMENTING].

Update plan file (if exists): Update the Status field in plan metadata:

bash

# Find latest plan file
plan_file=$(ls -1 "specs/${padded_num}_${project_name}/plans/implementation-"*.md 2>/dev/null | sort -V | tail -1)
if [ -n "$plan_file" ] && [ -f "$plan_file" ]; then
    # Try bullet pattern first, then non-bullet pattern
    sed -i 's/^\- \*\*Status\*\*: \[.*\]$/- **Status**: [IMPLEMENTING]/' "$plan_file"
    sed -i 's/^\*\*Status\*\*: \[.*\]$/**Status**: [IMPLEMENTING]/' "$plan_file"
fi

Stage 3: Create Postflight Marker

bash

mkdir -p "specs/${padded_num}_${project_name}"

cat > "specs/${padded_num}_${project_name}/.postflight-pending" << EOF
{
  "session_id": "${session_id}",
  "skill": "skill-neovim-implementation",
  "task_number": ${task_number},
  "operation": "implement",
  "reason": "Postflight pending: status update, artifact linking, git commit",
  "created": "$(date -u +%Y-%m-%dT%H:%M:%SZ)"
}
EOF

Stage 4: Prepare Delegation Context

json

{
  "session_id": "sess_{timestamp}_{random}",
  "delegation_depth": 1,
  "delegation_path": ["orchestrator", "implement", "skill-neovim-implementation"],
  "timeout": 3600,
  "task_context": {
    "task_number": N,
    "task_name": "{project_name}",
    "description": "{description}",
    "language": "neovim"
  },
  "plan_path": "specs/{NNN}_{SLUG}/plans/implementation-001.md",
  "metadata_file_path": "specs/{NNN}_{SLUG}/.return-meta.json"
}

Stage 5: Invoke Subagent

CRITICAL: You MUST use the Task tool to spawn the subagent.

code

Tool: Task (NOT Skill)
Parameters:
  - subagent_type: "neovim-implementation-agent"
  - prompt: [Include task_context, delegation_context, plan_path, metadata_file_path]
  - description: "Execute Neovim implementation for task {N}"

The subagent will:

•Read and parse implementation plan
•Execute phases sequentially
•Create/modify Neovim config files
•Verify changes with nvim --headless
•Create implementation summary
•Write metadata file
•Return brief text summary

Stage 6: Parse Subagent Return

bash

metadata_file="specs/${padded_num}_${project_name}/.return-meta.json"

if [ -f "$metadata_file" ] && jq empty "$metadata_file" 2>/dev/null; then
    status=$(jq -r '.status' "$metadata_file")
    phases_completed=$(jq -r '.metadata.phases_completed // 0' "$metadata_file")
    phases_total=$(jq -r '.metadata.phases_total // 0' "$metadata_file")
else
    status="failed"
fi

Stage 7: Update Task Status (Postflight)

If status is "implemented", update state.json and TODO.md.

Update state.json:

bash

jq --arg ts "$(date -u +%Y-%m-%dT%H:%M:%SZ)" \
   --arg status "completed" \
  '(.active_projects[] | select(.project_number == '$task_number')) |= . + {
    status: $status,
    last_updated: $ts,
    completed: $ts
  }' specs/state.json > /tmp/state.json && mv /tmp/state.json specs/state.json

Update TODO.md: Use Edit tool to change status marker to [COMPLETED].

Update plan file (if exists): Update the Status field to [COMPLETED] with verification:

bash

plan_file=$(ls -1 "specs/${padded_num}_${project_name}/plans/implementation-"*.md 2>/dev/null | sort -V | tail -1)
if [ -n "$plan_file" ] && [ -f "$plan_file" ]; then
    # Try bullet pattern first, then non-bullet pattern
    sed -i 's/^\- \*\*Status\*\*: \[.*\]$/- **Status**: [COMPLETED]/' "$plan_file"
    sed -i 's/^\*\*Status\*\*: \[.*\]$/**Status**: [COMPLETED]/' "$plan_file"
    # Verify update
    if grep -qE '^\*\*Status\*\*: \[COMPLETED\]|^\- \*\*Status\*\*: \[COMPLETED\]' "$plan_file"; then
        echo "Plan file status updated to [COMPLETED]"
    else
        echo "WARNING: Could not verify plan file status update"
    fi
else
    echo "INFO: No plan file found to update (file: $plan_file)"
fi

On partial/failed: Keep status as "implementing" for resume. Update plan file to [PARTIAL] or leave as [IMPLEMENTING] for retry.

Stage 8: Link Artifacts

Add implementation artifacts to state.json.

Stage 9: Git Commit

bash

git add -A
git commit -m "task ${task_number}: complete implementation

Session: ${session_id}

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>"

Stage 10: Cleanup

bash

rm -f "specs/${padded_num}_${project_name}/.postflight-pending"
rm -f "specs/${padded_num}_${project_name}/.return-meta.json"

Stage 11: Return Brief Summary

code

Implementation completed for task {N}:
- Executed {phases_completed}/{phases_total} phases
- Created/modified Neovim config files
- Verified startup and module loading
- Created summary at specs/{NNN}_{SLUG}/summaries/implementation-summary-{DATE}.md
- Status updated to [COMPLETED]
- Changes committed

Error Handling

Plan Not Found

Return error if implementation plan doesn't exist.

Verification Failure

If nvim --headless fails:

•Keep status as "implementing"
•Mark phase as [PARTIAL]
•Report verification error

Git Commit Failure

Non-blocking: Log failure but continue.

Return Format

Brief text summary (NOT JSON).