iCal Calendar

Use this skill when the user explicitly wants .ics or iCal data, or when the available source is an iCal file, string, or feed.

Source selection

Before querying, identify the real iCal source:

• Local file: icali --file "/absolute/path/to/calendar.ics"
• Remote feed: icali --url "https://example.com/calendar.ics"
• Raw iCal text: icali --string "BEGIN:VCALENDAR..."
• The positional source argument also works, but explicit --file or --url is usually clearer in agent logs

Never invent a calendar source. If the source is not provided, look for one in the workspace or prior context. If none is available, say you need the .ics path, URL, or raw iCal text.

CLI facts that matter

Prefer --json unless the user explicitly wants raw CLI output.

Important flags:

• --date YYYY-MM-DD for one calendar day
• --from YYYY-MM-DD [--to YYYY-MM-DD] for a date range
• --from-datetime YYYY-MM-DDTHH:mm [--to-datetime YYYY-MM-DDTHH:mm] for a local time window
• --today as a shortcut for the active timezone
• --tz <IANA zone> or --utc
• --search <pattern> for OR search across summary, description, and location
• --field <k=v> for exact field targeting with AND semantics across repeats
• --field-any <k=v> for OR search across named fields
• --limit <n> for the next few matches
• --exclude-status <s> to drop cancelled items
• --type <name> where the default is event

Semantics:

• Range windows are half-open: items match when they overlap [from, to) or [from-datetime, to-datetime)
• --to and --to-datetime are exclusive
• --from and --from-datetime may be used without an end value for open-ended upcoming queries
• --date cannot be combined with range flags
• Repeated --field filters are ANDed
• Repeated --field-any groups are ANDed, while fields inside one --field-any group are ORed
• --search is shorthand for OR search across summary, description, and location
• --exclude-status matches statuses case-insensitively and may be repeated
• Date matching uses the active timezone, so set --tz when local day boundaries matter
• All-day events still use exclusive end semantics

Default workflow

1. Determine the source and timezone that should govern phrases like "today", "this week", "tomorrow morning", or "upcoming".
2. Translate the request into:
   • a source flag
   • a date or datetime window
   • a text filter or field-specific filter
   • optional --exclude-status CANCELLED
   • optional --limit
   • --json
3. Run icali.
4. Post-process the JSON in the agent:
   • confirm the interpreted range in plain English
   • keep only the matches that answer the user's question
   • summarize clearly instead of dumping raw JSON

Natural-language patterns

What's on my calendar today

Use:

icali --file "/path/to/calendar.ics" --today --json

If the timezone should be explicit:

icali --file "/path/to/calendar.ics" --today --tz Europe/London --json

What's on my calendar on a specific day

Use:

icali --file "/path/to/calendar.ics" --date 2026-04-14 --json

What's on my calendar this week

Translate the phrase into an exact week window, then use a date range:

icali --file "/path/to/calendar.ics" --from 2026-04-13 --to 2026-04-20 --json

State the interpreted range in the answer, especially if the locale or timezone affects week boundaries.

What's on my calendar this afternoon

Use a local datetime window:

icali --file "/path/to/calendar.ics" --from-datetime 2026-04-11T12:00 --to-datetime 2026-04-11T18:00 --json

Do I have any upcoming meetings with Stacey

Prefer --search plus an open-ended future window:

icali --file "/path/to/calendar.ics" --from 2026-04-11 --search "/stacey/i" --exclude-status CANCELLED --json

If the user asks for only the next few:

icali --file "/path/to/calendar.ics" --from 2026-04-11 --search "/stacey/i" --exclude-status CANCELLED --limit 3 --json

Find events matching a topic in specific fields

Use --field when the field itself matters:

icali --file "/path/to/calendar.ics" --field "summary=/review/i" --json

Use --field-any when the match may appear in one of several fields:

icali --file "/path/to/calendar.ics" --field-any "summary,description,location=/review/i" --json

Exclude cancelled events from a normal lookup

Use:

icali --file "/path/to/calendar.ics" --from 2026-04-11 --to 2026-04-18 --exclude-status CANCELLED --json

Query design guidance

Prefer these defaults:

• For day questions: --date or --today
• For week or multi-day questions: --from and --to
• For time-of-day questions: --from-datetime and --to-datetime
• For person or topic matching: --search "/name/i"
• For meeting-oriented questions: add --exclude-status CANCELLED
• For "next few" phrasing: add --limit

Use fielded matching only when needed:

• --search is the simplest natural-language default
• --field is for exact field targeting
• --field-any is for named-field OR matching

Avoid these mistakes:

• Do not answer without identifying the real .ics source
• Do not omit timezone handling when day boundaries or local times matter
• Do not use --date when the user asked for a range
• Do not use repeated --field flags when the user really wants OR semantics
• Do not forget that --to and --to-datetime are exclusive

Output expectations

Return a normal calendar answer, not a CLI transcript.

Include:

• the interpreted date or datetime window
• the matching events in chronological order
• whether cancelled items were excluded when that affects the result
• a clear "no matches" answer when nothing qualifies

If the request is underspecified, say exactly what is missing:

• missing iCal source
• ambiguous timezone
• no accessible .ics file or feed found