block

Quick Calendar Block

Single-purpose: turn "I'm about to work on X for an hour" into a calendar event in one step.

Settings used

• calendar_timezone — default for events
• calendar_id — defaults to primary if absent
• project_prefixes — {prefix, project_id, name} for auto-prefix matching

If the settings file is missing, default to America/Chicago + primary and skip auto-prefix.

Local time override

If the user specifies a non-default timezone ("8pm Rio", "7pm Berlin"), convert to calendar_timezone for the API but confirm in both timezones. Aliases: Rio → America/Sao_Paulo, Berlin → Europe/Berlin.

Argument parsing

Parse $ARGUMENTS:

• Duration: first token matching a time pattern (30m, 45m, 1h, 1.5h, 90m). Default 30m.
• Title: everything else after extracting duration. If empty, ask: "What are you working on? (and how long, default 30m)"

Examples

Input	Duration	Title
(none)	30m (after asking)	(asked)
45m ATN: Deploy hotfix	45m	ATN: Deploy hotfix
1h SAN: Code review PR #142	60m	SAN: Code review PR #142
PR review	30m	PR review

Workflow

Step 1 — Parse input

Extract duration and title.

Step 2 — Apply client prefix

If the title doesn't already start with a known prefix from project_prefixes, scan the title for case-insensitive substring matches against each entry's name. If a match is found, prepend the entry's prefix:. Otherwise leave the title alone — never guess.

Example with project_prefixes:

- prefix: ATN, name: Athletech News
- prefix: SAN, name: Sportsnaut
- prefix: AP,  name: Alpha Particle

Input title	Prefixed title
"Deploy hotfix"	"Deploy hotfix" (no match)
"Athletech bug fix"	"ATN: Athletech bug fix"
"ATN: Deploy"	"ATN: Deploy" (already prefixed)

Step 3 — Get current time

Compute "now" in <calendar_timezone>. Use Bash date if needed.

Step 4 — Create event

mcp__claude_ai_Google_Calendar__create_event with:

• calendarId: <calendar_id>
• summary: prefixed title
• start.dateTime: now in ISO 8601 with <calendar_timezone> offset
• start.timeZone: <calendar_timezone>
• end.dateTime: now + duration
• end.timeZone: <calendar_timezone>

Step 5 — Confirm

One-line confirmation:

Blocked: [title] [HH:MM]-[HH:MM]

Example:

Blocked: ATN: Deploy hotfix 14:30-15:15

That's the whole skill. No follow-up unless the user asks.