A new read command answers what a behaviour authentication alert asks —
which assets the user authenticated to around the alert, and which were new —
in one call: it resolves the Asset Authentication log set, builds the
keyword query and the 24 h window itself, and summarizes all events and,
apart, those marked new_authentication. Across real runs gpt-oss mangled log
set ids, computed the window a day off, put a filter inside the LEQL (HTTP
400) and read ten lines out of a thousand; this leaves it nothing to get
wrong. Static calls it first for such alerts; list_investigation_alerts
points to it.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_015RhL2gy6Sx6Y3FEsyBE3mZ
query_log_set takes only="field=value[, …]", applied to the events' fields
after the search (case ignored), and says how many matched before it. Static
runs a second summary of the same query restricted to what the alert is about
— for a "new assets" alert, the new authentications — and names their
destination assets: the first real run summarized 978 events but left the 64
new ones mixed in.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_015RhL2gy6Sx6Y3FEsyBE3mZ
summarize=true returns, over every matching event, each field's most frequent
values with counts, the first and last event time and five samples, instead of
the raw events. On a real run Static got 1000 raw events, could read about
ten, and reported the hosts and accounts of those ten; 300 events now fit in
about 1.5 KB. Static passes summarize always and quotes the returned window.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_015RhL2gy6Sx6Y3FEsyBE3mZ
query_log_set takes anchor_time with hours_before / minutes_after and computes
the window itself, and returns it as text: on a real run the agent computed
"24 hours before 2026-10-11T00:04Z" as ending on the 10th and reported a
day-old window. Static passes the alert's first seen time instead of dates,
and lists domain controllers apart from the new assets.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_015RhL2gy6Sx6Y3FEsyBE3mZ
query_log_set accepts log_set_name and resolves the id itself (exact name, or
the one set whose name contains it; otherwise refused with the existing
names): on a real run the model mangled a 36-character id it copied. Static
queries by name, retries a 0-event keyword search case-insensitively, takes
the 24 hours before a behaviour alert (they aggregate hours of activity), and
always looks for the user's other investigations.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_015RhL2gy6Sx6Y3FEsyBE3mZ
list_investigation_alerts now marks each alert with alert_rrn, evidence_api
and next: a behaviour alert with no RRN says, in the output the agent reads,
that the Alert Triage commands answer 404 for it and that its evidence is in
the authentication logs. Static still called them when only its instructions
said so. Its sheet gets 14 calls spent in a stated order, authentication log
sets for lateral-movement alerts (never file access), and a window built from
first and last seen.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_015RhL2gy6Sx6Y3FEsyBE3mZ
agents/operator.yaml: read-only commands, analyst_l2 ceiling, and the procedure
learned on a real UBA alert (start from the investigation's alerts, plain-UUID
alerts have no Alert Triage evidence, LEQL keyword search in parentheses,
search_investigation takes start_time/end_time). README documents agents/.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_015RhL2gy6Sx6Y3FEsyBE3mZ
f3nris