ashlr
MCP tools

ashlr__logs

Token-efficient log tail. Detects severity, filters by level or timestamp, collapses repeated lines.

Server: ashlr-logs — servers/logs-server.ts

Reads the last N lines of a log file (or glob), detects severity with a suite of common patterns, optionally filters by level and/or timestamp, and collapses runs of identical lines into "(42x) same message".

Severity detection

Handles: bracketed [ERROR], bare error:, Python tracebacks, JSON {"level": "error"}, syslog format, and more. Unrecognized lines are classified as INFO.

Input schema

FieldTypeRequiredDescription
pathstringyesLog file path or glob pattern
linesnumbernoNumber of tail lines to read (default: 100)
levelstringnoFilter to ERROR, WARN, INFO, or DEBUG
sincestringnoISO timestamp — only return lines after this time
collapsebooleannoCollapse repeated lines (default: true)

Output format

[ashlr__logs] /var/log/app.log  ·  last 100 lines  ·  3 ERROR, 7 WARN

2024-01-15 09:23:14 [ERROR] Connection refused to postgres://...
2024-01-15 09:23:15 [ERROR] Retry 1/3...
(2x) same message
2024-01-15 09:23:18 [ERROR] Max retries exceeded

Example

Use ashlr__logs to tail /var/log/nginx/error.log filtering for ERROR

Savings baseline

A 10,000-line log file with 50 unique messages at 200 repetitions each returns in ~50 lines via collapse mode.

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