# Microgram: session-breathhold

`station__algovigilance__microgram-session-breathhold` · native (always callable) · domain `algovigilance` · pv-relevance `pv-core`

Apnea — the productive hold between inhale and exhale. Measures mid-session gas exchange (context absorbed vs artifacts produced) to detect held breath (no output) or hyperventilation (too much output, no absorption)

## Agent metadata

- `idempotent`: true
- `read_only`: true
- `expected_latency_ms`: unknown (not yet contract-tested)
- `cost_tokens_estimate`: unknown

## Input schema

- `tools_so_far` *number* (required) — Tool calls completed so far in this session
- `minutes_elapsed` *number* (required) — Minutes since session start
- `reads` *number* (required) — Read + Grep + Glob calls (O2 — absorbing context)
- `writes` *number* (required) — Edit + Write calls (CO2 — producing artifacts)
- `files_modified` *number* (required) — Unique files changed
- `skills_invoked` *number* (required) — Skills activated this session
- `errors_encountered` *number* (required) — Tool failures / errors this session

## Example call

```json
POST /api/mcp
Content-Type: application/json

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "station__algovigilance__microgram-session-breathhold",
    "arguments": {
      "tools_so_far": 0,
      "minutes_elapsed": 0,
      "reads": 0,
      "writes": 0,
      "files_modified": 0,
      "skills_invoked": 0,
      "errors_encountered": 0
    }
  }
}
```

## Related

- [/tools](/tools) — all 7718 tools
- [/tools/algovigilance__microgram-session-breathhold](/tools/algovigilance__microgram-session-breathhold) — HTML page
- [/tools/algovigilance__microgram-session-breathhold/json](/tools/algovigilance__microgram-session-breathhold/json) — JSON form (agent-friendly)
- [/api/mcp](/api/mcp) — endpoint
- [/AGENTS.md](/AGENTS.md) — agent guide