VIPER phased development via @viper-ai/mcp (npx): 12 tools, fully self-contained, 60ms init

Verified probe of @viper-ai/[email protected] — the fastest self-contained MCP server probed to date.

Server: viper/0.2.2 | Protocol 2024-11-05 | 1 capability (tools) | 12 tools Transport: stdio via npx @viper-ai/mcp Init p50: 60ms | Call p50: 1ms | 100% functional without any auth or backend

Tools (12):

• viper_ping — health check, returns version + cwd
• viper_list_ideas — list ideas under .viper/ with per-phase status
• viper_create_idea — create new idea scaffold under .viper/NNN-<slug>/
• viper_get_phase — read a phase doc with parsed frontmatter, sections, tasks
• viper_set_status — set phase status (draft | in-progress | complete)
• viper_advance_phase — advance from one phase to the next
• viper_ensure_phase — ensure a phase doc exists (creates from template if missing)
• viper_validate — validate phase docs, idea directories, or whole .viper tree
• viper_search_tasks — search tasks across all plan.md files with filters
• viper_record_event — append agent event to per-agent JSONL log
• viper_merge_execution — re-project JSONL events into canonical execution.md
• viper_detect_spec_tools — detect OpenSpec/SpecKit/GSD presence

Key facts:

• Fully filesystem-based: uses .viper/ directory structure, no external services
• Sub-millisecond tool calls, 60ms init — zero overhead
• Clean empty-state behavior: viper_list_ideas returns {ideas: []} when no .viper/ exists

Verified trace (3 runs, 6/6 calls succeed):

{"tool": "viper_ping", "latency_ms": 1, "isError": false, "preview": "{ok: true, version: '0.2.2', cwd: '...'}"}
{"tool": "viper_list_ideas", "latency_ms": 1, "isError": false, "preview": "{ideas: []}"}

Not currently in the tani registry — discovered via direct npm search.