Pp Google Calendar

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Google Calendar — Printing Press CLI

Prerequisites: Install the CLI

This skill drives the google-calendar-pp-cli binary. You must verify the CLI is installed before invoking any command from this skill. If it is missing, install it first:

1. Install via the Printing Press installer. It defaults binaries to $HOME/.local/bin on macOS/Linux and %LOCALAPPDATA%\Programs\PrintingPress\bin on Windows:

   npx -y @mvanhorn/printing-press-library install google-calendar --cli-only

2. Verify: google-calendar-pp-cli --version
3. Ensure the reported install directory is on $PATH for the agent/runtime that will invoke this skill.

If the npx install fails (no Node, offline, etc.), fall back to a direct Go install (requires Go 1.26.5 or newer). This installs into $GOPATH/bin (default $HOME/go/bin), so add that directory to $PATH instead:

go install github.com/mvanhorn/printing-press-library/library/productivity/google-calendar/cmd/google-calendar-pp-cli@latest

If --version reports "command not found" after install, the runtime cannot see the binary directory on $PATH. Do not proceed with skill commands until verification succeeds. Role-scoped OAuth profiles (a read-only account literally cannot write, by token), a conflicts engine whose all-clear carries coverage evidence, and mutations that are idempotent, etag-guarded, undo-bearing, and structurally incapable of emailing attendees. Built as the calendar substrate for an always-on personal-assistant agent; useful to anyone juggling multiple Google accounts from scripts.

When to Use This CLI

Reach for this CLI whenever schedule truth spans more than one Google account: conflict sweeps, availability questions, agenda merges, and gated calendar writes performed on a human's behalf. It is deliberately stateless — every answer is a live read with freshness evidence, so it suits agents whose answers must be citable.

When NOT to Use This CLI

Do not trigger this skill for:

• Gmail / email — this CLI touches only the Calendar API; it cannot read or send mail.
• Google Tasks or Reminders — not part of the Calendar events surface here.
• Calendar sharing / ACL changes — granting or revoking access is out of scope by design; do it in the Calendar UI. manifest check only reports permission drift.
• Natural-language date parsing ("next Tuesday-ish", quickAdd) — the caller resolves language to dates; this CLI takes explicit YYYY-MM-DD/RFC3339 (plus literal today and +Nd on window flags).
• Mutating attendee-bearing events or emailing invitees — structurally refused: sendUpdates=none is forced on every mutation and events with attendees are never written by this tool.
• Availability of people outside the configured accounts — verdicts cover only calendars in the approved calendars.yaml manifest.

Unique Capabilities

These capabilities aren't available in any other tool for this API.

Verdict contracts

• conflicts — One command answers 'am I double-booked?' across every account, and refuses to give a confident all-clear over partial or stale data.

  Reach for this whenever asserting schedule truth to a human — its downgrade semantics make the answer citable.

  google-calendar-pp-cli conflicts --from 2026-08-18 --to 2026-08-25 --agent

• slots — Ranked open windows of a requested duration across all accounts, computed from live freebusy under the same busy semantics as conflicts.

  Use when proposing meeting times — 'open' carries coverage evidence, not guesswork.

  google-calendar-pp-cli slots --duration 90m --from 2026-08-18 --to 2026-08-22 --agent

Safe writes

• events update — Writes take an etag precondition and return the pre-image plus a structured inverse operation, so every change is cleanly reversible and race-safe.

  Use for any mutation an agent must be able to echo-with-undo to its principal.

  google-calendar-pp-cli events update primary evt123 --account ads --start 2026-08-19T15:00:00-06:00 --if-etag "abc" --json

Governance and drift

• changes — Everything that moved, appeared, or was cancelled across all accounts since a caller-held watermark — deletions included.

  Run between full sweeps to catch mid-day schedule movement cheaply.

  google-calendar-pp-cli changes --since 2026-08-17T07:00:00Z --agent

• manifest check — Diffs live calendar reality across all accounts against the approved calendars.yaml — new, missing, or permission-drifted calendars become findings.

  Schedule this as hygiene; run it before trusting any multi-account verdict after account changes.

  google-calendar-pp-cli manifest check --json

• events exceptions — Instances of recurring events that moved or were cancelled in a window — the routine-deviation surprises, isolated.

  Use in look-ahead sweeps: deviations from routine are the highest-yield surprise class.

  google-calendar-pp-cli events exceptions --from 2026-08-18 --to 2026-08-25 --agent

Command Reference

accounts — gauth profiles

• google-calendar-pp-cli accounts — List gauth profiles and each token's status (roles decide OAuth scopes).
• google-calendar-pp-cli accounts auth --account <name> (or --all) — Run the browser OAuth flow for one profile (or every profile), requesting only the profile role's scopes.

agenda / calendars — merged reads

• google-calendar-pp-cli agenda --from <when> --to <when> — Merged agenda across every manifest calendar, sorted by start, with per-source freshness and a coverage block.
• google-calendar-pp-cli calendars — Merged calendar list across all accounts (account, summary, access role, id).
• google-calendar-pp-cli calendars <calendarId> --account <name> — Metadata for one calendar.

calendars events — per-calendar event CRUD (every mutation passes the safety barrier: sendUpdates=none forced, attendee-bearing events refused, etag preconditions)

• google-calendar-pp-cli calendars events list <calendarId> — Events on one calendar (--q, --time-min, --time-max, --single-events, --show-deleted, ...).
• google-calendar-pp-cli calendars events get <calendarId> <eventId> — One event.
• google-calendar-pp-cli calendars events instances <calendarId> <eventId> — Instances of a recurring event.
• google-calendar-pp-cli calendars events insert <calendarId> (alias create) — Create an event.
• google-calendar-pp-cli calendars events update|patch <calendarId> <eventId> — Full/partial update (prefer the top-level events update for the undo-bearing contract).
• google-calendar-pp-cli calendars events delete <calendarId> <eventId> — Delete an event.
• google-calendar-pp-cli calendars events move <calendarId> <eventId> --destination <calendarId> — Move an event to another calendar.

free-busy — raw passthrough

• google-calendar-pp-cli free-busy --items <list> --time-min <rfc3339> --time-max <rfc3339> — Free/busy for a set of calendars on one account. Prefer slots/conflicts for cross-account availability verdicts.

doctor

• google-calendar-pp-cli doctor — Health check (--fail-on warn for automation).

Finding the right command

When you know what you want to do but not which command does it, ask the CLI directly:

google-calendar-pp-cli which "<capability in your own words>"

which resolves a natural-language capability query to the best matching command from this CLI's curated feature index. Exit code 0 means at least one match; exit code 2 means no confident match — fall back to --help or use a narrower query.

Recipes

Morning conflict sweep

google-calendar-pp-cli conflicts --from today --to +7d --agent

The daily verdict: overlaps, mirrors flagged separately, and an explicit coverage line.

Narrow a verbose agenda for context-poor consumers

google-calendar-pp-cli agenda --from today --to +2d --agent --select events.summary,events.start,events.account

Dotted-path narrowing keeps multi-account agenda payloads small enough for tight agent contexts.

Find 90 minutes this week

google-calendar-pp-cli slots --duration 90m --from today --to +5d --between 09:00-17:00 --agent

Ranked open windows under the same busy semantics as conflicts — no false frees.

What moved since 7am

google-calendar-pp-cli changes --since 2026-08-17T07:00:00Z --agent

Stateless mid-day sweep; cancellations included.

Reversible reschedule

google-calendar-pp-cli events update primary evt123 --account ads --start 2026-08-19T15:00:00-06:00 --if-etag "etag-from-read" --json

Fails cleanly if the event changed since you read it; response carries the pre-image and inverse op.

Auth Setup

Auth is per-profile installed-app OAuth: you supply a client.json from your own Google Cloud project, then run auth --account <name> once per account. Each profile declares a role — readonly profiles request calendar.readonly only, so write scopes never exist on that token. Tokens live in the configured token dir, never in the repo.

Run google-calendar-pp-cli doctor to verify setup.

Agent Mode

Add --agent to any command. Expands to: --json --compact --no-input --no-color --yes.

• Pipeable — JSON on stdout, errors on stderr

• Filterable — --select keeps a subset of fields. Dotted paths descend into nested structures; arrays traverse element-wise. Critical for keeping context small on verbose APIs:

  google-calendar-pp-cli calendars primary --account personal --agent --select id,summary,accessRole

• Previewable — --dry-run shows the request without sending

• Offline-friendly — sync/search commands can use the local SQLite store when available

• Non-interactive — never prompts, every input is a flag

• Explicit retries — use --idempotent only when an already-existing create should count as success, and use --ignore-missing only when a missing delete target should count as success

Response envelope

Commands that read from the local store or the API wrap output in a provenance envelope:

{
  "meta": {"source": "live" | "local", "synced_at": "...", "reason": "..."},
  "results": <data>
}

Parse .results for data and .meta.source to know whether it's live or local. A human-readable N results (live) summary is printed to stderr only when stdout is a terminal AND no machine-format flag (--json, --csv, --compact, --quiet, --plain, --select) is set — piped/agent consumers and explicit-format runs get pure JSON on stdout.

Paths and state

Agents should treat the CLI's path resolver as part of the runtime contract:

• Use --home <dir> for one invocation, or set GOOGLE_CALENDAR_HOME=<dir> to relocate all four path kinds under one root.

• Use per-kind env vars only when a specific kind must diverge: GOOGLE_CALENDAR_CONFIG_DIR, GOOGLE_CALENDAR_DATA_DIR, GOOGLE_CALENDAR_STATE_DIR, GOOGLE_CALENDAR_CACHE_DIR.

• Resolution order is per-kind env var, --home, GOOGLE_CALENDAR_HOME, XDG (XDG_CONFIG_HOME, XDG_DATA_HOME, XDG_STATE_HOME, XDG_CACHE_HOME), then platform defaults.

• config contains settings like config.toml and profiles. data contains credentials.toml, data.db, cookies, and auth sidecars. state contains persisted queries, jobs, and teach.log. cache contains regenerable HTTP/cache files.

• Stored secrets live in credentials.toml under the data dir. Existing legacy config.toml secrets are read for compatibility and leave config.toml on the first auth write.

• Run google-calendar-pp-cli doctor --fail-on warn to surface path and credential-location warnings. agent-context exposes a schema v4 paths block for agents that need the resolved dirs.

• For MCP, pass relocation through the MCP host config. The MCP binary does not inherit CLI flags:

  {
    "mcpServers": {
      "google-calendar": {
        "command": "google-calendar-pp-mcp",
        "env": {
          "GOOGLE_CALENDAR_HOME": "/srv/google-calendar"
        }
      }
    }
  }

Fleet precedence: an inherited per-kind env var overrides an explicit --home for that kind. Use GOOGLE_CALENDAR_HOME or per-kind vars as durable fleet levers, and use --home only for a single invocation. Relocation is not reversible by unsetting env vars; move files manually before clearing GOOGLE_CALENDAR_HOME, or doctor will not find credentials left under the former root.

Automatic learning

This CLI ships a self-capturing learning loop. The CLI does its own bookkeeping: every invocation is journaled locally, a failed flag followed by a corrected retry auto-derives a flag_alias candidate, and a teach on a query family without a playbook auto-synthesizes a playbook_candidate from the session's journal. Your job is judgment only: recall first, act on surfaced candidates, teach the final answer, playbook amend when you observe a correction. You never record failures by hand.

Step 1: recall before any discovery

Before list/search/drill commands on a new user question, run:

google-calendar-pp-cli recall "<user's question>" --agent

The response envelope:

{
  "query": "...",
  "normalized": "<normalized form>",
  "query_entities": ["..."],
  "found": true | false,
  "match_score": 0.0,
  "results": [
    { "resource_id": "...", "resource_type": "...", "venue": "...",
      "confidence": 2, "entity_match": "exact|partial|unknown",
      "source": "taught|preseed|pattern", "warnings": ["..."] }
  ],
  "mismatches": [ /* only when --debug-mismatches */ ],
  "warnings": [ /* top-level */ ],
  "candidates": [
    { "id": 12, "class": "flag_alias | playbook_candidate",
      "summary": "...", "sightings": 3, "last_seen": "...",
      "rationale": "...",
      "next_action": ["<trial command>", "google-calendar-pp-cli learnings confirm 12"] }
  ],
  "playbook": {
    "query_family": "...",
    "playbook": {
      "steps": [ { "cmd": "<command with {slot} substitution>", "purpose": "..." } ],
      "entity_slots": ["$ENTITY"],
      "expected_tool_calls": 3
    },
    "slots_resolved": { "$ENTITY": { "token": "<live token>", "canonical": "<canonical>" } },
    "notes": "<workarounds + gotchas for this query family>"
  },
  "notes": "<duplicate surface for non-playbook callers>"
}

Empty-store short-circuit: if the store has no learnings, playbooks, or candidates yet (recall finds nothing and learnings list and learnings candidates are both empty), skip recall for the rest of this session instead of taxing every query; resume recall-first once something has been taught.

Step 2: decision tree

Read candidates, playbook, notes, results[0], and warnings in that order:

if Candidates present (warnings include "candidates_present"):
    -> candidates are try-then-confirm, never facts. Follow each candidate's
       two-step next_action verbatim: run the trial command first, then run
       `learnings confirm <id>` only after the trial verified the behavior.
       Reject a wrong candidate with `learnings reject <id>`.
    -> NEVER re-teach something recall surfaced as a candidate; confirm or
       reject that candidate instead of teaching a duplicate.
    -> candidates ride alongside playbooks and resource hits, not instead of
       them; continue with the branches below after acting on them.

if Playbook present:
    -> READ Playbook.notes verbatim FIRST (workarounds + gotchas the CLI surface doesn't expose)
    -> replay Playbook.steps in order, substituting Playbook.slots_resolved entries
       for the entity slot tokens. If a step's slot is unresolved, fall back to
       discovery for that step only.
    -> the Playbook's expected_tool_calls is a budget; if you find yourself running
       materially more, record the divergence via `google-calendar-pp-cli playbook amend`
       at end-of-session.

elif Notes present (no Playbook):
    -> read Notes verbatim before any discovery step; they carry known gotchas
       for this query family even when no structured choreography exists yet.

elif Found AND Results[0].EntityMatch == "exact" AND Results[0].Confidence >= 2:
    -> skip discovery; fetch live data for Results[*].ResourceID in parallel

elif Found AND Results[0].EntityMatch == "partial":
    -> candidate hint, NOT a hit; read the resource title to validate before trusting

elif (any row in Mismatches[] when --debug-mismatches was passed):
    -> treat as cold start; the stored learning is for a different entity
       (different canonical resolved from query_entities)

else:  // Found == false, no playbook, no notes
    -> cold start; run discovery normally; teach the answer afterward (Step 4).
       If the family has no playbook yet, that teach auto-synthesizes a
       playbook candidate from this session's journal - you do not need to
       record one by hand.

Playbook and Notes are orthogonal to the per-resource path. A recall response can carry both a Playbook AND a Results[] hit - use both: the Playbook tells you which choreography to run; the resource hits short-circuit specific steps. Default to skipping mismatches; pass --debug-mismatches only when investigating cold-start surprises.

Candidate judgment details: learnings confirm <id> prints the candidate's full payload before materializing it - check that the printed payload matches the behavior you verified. learnings reject <id> tombstones the derivation signature so the same candidate does not resurface. The envelope carries only the few candidates worth acting on now; google-calendar-pp-cli learnings candidates lists the full open set.

Graceful degradation: if learnings confirm is an unknown command, you are driving an older binary - ignore the candidates guidance and follow the rest of the protocol.

Step 3: always read warnings

• low_confidence: row exists at confidence<2. Treat as a hint, not a skip-discovery hit.
• resource_not_in_store: the local store doesn't have the resource the learning points at. The match validator couldn't classify entities — direct-fetch and re-evaluate.
• cross_alias_match (per-result): the row was taught under a different alias and matched the live query's canonical via entity_lookups (e.g., a "USA" teach satisfying a "United States" recall). Trust the resource_id.
• similar_shape_different_entity:<canonical> (top-level): a structurally matching row exists but its canonical entity differs from the live query's. Treated as cold start; the warning carries the conflicting canonical as a hint, but the row is NOT promoted into Results.
• ambiguous_alias (top-level): a single query entity resolved to multiple canonicals (e.g., "Cards" → Arizona Cardinals + St. Louis Cardinals). Surface the ambiguity from context before committing to a resource.
• candidates_present (top-level): the envelope carries a candidates section. Handle it via the candidates branch in Step 2 before anything else.
• lookup_refresh_available (top-level): an entity in the query has no lookup row yet, but synced data could provide one. Run google-calendar-pp-cli sync to refresh entity lookups.
• Top-level no_learnings_for_query_family: the table had no rows above the Jaccard floor. Pure cold start.