Segment Manager

Purpose

Full segment lifecycle management -- list, get, create, update, delete, validate FilterQL, and estimate segment size.

Environment

Requires authenticated API access. See ../references/auth.md for credential resolution.

API Endpoints

List Segments

curl -s "${LYTICS_API_URL:-https://api.lytics.io}/v2/segment?table=user&kind=segment&sizes=true" \
  -H "Authorization: ${LYTICS_API_TOKEN}"

Query params: table, kind, valid, sizes

Get Segment

curl -s "${LYTICS_API_URL:-https://api.lytics.io}/v2/segment/${SEGMENT_ID}?sizes=true&inline=true" \
  -H "Authorization: ${LYTICS_API_TOKEN}"

Query params: sizes (include size data), inline (inline included segments)

Get Segment Ancestors

curl -s "${LYTICS_API_URL:-https://api.lytics.io}/v2/segment/${SEGMENT_ID}/ancestors" \
  -H "Authorization: ${LYTICS_API_TOKEN}"

Create Segment

curl -s -X POST "${LYTICS_API_URL:-https://api.lytics.io}/v2/segment" \
  -H "Authorization: ${LYTICS_API_TOKEN}" \
  -H "Content-Type: application/json" \
  -d '{
    "name": "Segment Name",
    "slug_name": "segment_slug",
    "description": "What this segment represents",
    "segment_ql": "FILTER condition FROM user ALIAS segment_slug",
    "kind": "segment",
    "table": "user",
    "is_public": true,
    "tags": [],
    "save_hist": true
  }'

Update Segment

curl -s -X PUT "${LYTICS_API_URL:-https://api.lytics.io}/v2/segment/${SEGMENT_ID}" \
  -H "Authorization: ${LYTICS_API_TOKEN}" \
  -H "Content-Type: application/json" \
  -d '{ ... updated fields ... }'

Delete Segment

curl -s -X DELETE "${LYTICS_API_URL:-https://api.lytics.io}/v2/segment/${SEGMENT_ID}" \
  -H "Authorization: ${LYTICS_API_TOKEN}"

Validate FilterQL

curl -s -X POST "${LYTICS_API_URL:-https://api.lytics.io}/api/segment/validate" \
  -H "Authorization: ${LYTICS_API_TOKEN}" \
  -H "Content-Type: text/plain" \
  -d 'FILTER AND (country = "US", visitct > 5) FROM user ALIAS test'

Returns 200 on valid, error message on invalid.

Estimate Segment Size (ad-hoc FilterQL)

curl -s -X POST "${LYTICS_API_URL:-https://api.lytics.io}/api/segment/size" \
  -H "Authorization: ${LYTICS_API_TOKEN}" \
  -H "Content-Type: text/plain" \
  -d 'FILTER condition FROM user'

Body is raw FilterQL text, not JSON.

Get Existing Segment Size

curl -s "${LYTICS_API_URL:-https://api.lytics.io}/api/segment/${SEGMENT_ID}/size" \
  -H "Authorization: ${LYTICS_API_TOKEN}"

Segment Field Info -- Audience Snapshot

curl -s "${LYTICS_API_URL:-https://api.lytics.io}/api/segment/${SEGMENT_ID}/fieldinfo?limit=20&table=user" \
  -H "Authorization: ${LYTICS_API_TOKEN}"

Returns per-field analytics within a segment: value distributions, coverage rates, numeric stats, and histograms. Query params: fields (comma-delimited), limit (default 20, max 1000), table, cached. For detailed analysis, use the audience-snapshot skill.

Reevaluate Segment

curl -s -X POST "${LYTICS_API_URL:-https://api.lytics.io}/v2/segment/reevaluate" \
  -H "Authorization: ${LYTICS_API_TOKEN}" \
  -H "Content-Type: application/json" \
  -d '{"id": "segment_id"}'

Segment Payload

Required fields for creation:

{
  "name": "Display Name",
  "slug_name": "url_friendly_slug",
  "description": "Human-readable description",
  "segment_ql": "FILTER ... FROM user ALIAS slug",
  "kind": "segment",
  "table": "user",
  "is_public": true,
  "save_hist": true
}

Optional fields:

{
  "tags": ["tag1", "tag2"],
  "groups": ["group_id"],
  "expires_at": "2025-12-31T00:00:00Z",
  "emit_trigger": false,
  "schedule_exit": false
}

Segment Kinds

Kind	Description	Use Case
segment	Standard audience segment	General audience targeting
aspect	Building block segment	Reusable filter components
goal	Business objective	Conversion tracking
list	Temporal export list	One-time or recurring exports
conversion	Campaign tracking	Attribution measurement
metric	Metric segment	Analytics/reporting
managed	System-managed	Internal platform use
candidate	Decisioning exclusion	Exclude from decisioning

Behavior

For Read Operations (list, get, size)

Execute immediately and display results.

For Write Operations (create, update, delete)

Use the confirmation-gate pattern:

1. Build complete payload
2. Show human-readable summary
3. Show raw API payload
4. Wait for user confirmation
5. Execute on approval

Validation Flow

Before creating/updating a segment:

1. Validate the FilterQL with POST /api/segment/validate
2. If invalid, parse error and attempt to fix (max 3 retries)
3. Once valid, estimate size with POST /api/segment/size
4. Present validation + size results before proceeding

Error Handling

• Invalid FilterQL: Parse the validation error, identify the issue, suggest fix
• Slug conflict (409): Suggest alternative slug name
• Empty segment (size 0): Warn user, suggest broadening criteria
• Very large segment: Note the size and ask user to confirm intent

Dependencies

• Uses: ../references/auth.md, ../references/api-client.md, ../references/confirmation-gate.md
• References: ../references/filterql-grammar.md