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Log triage at ingest. Group logs into patterns, judge each pattern once, page only on what matters.
- Forks
- 1
- Last pushed
- Updated Sep 2026
Repo stats from the GitHub API, cached Oct 2026.
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Tocsin
A Rust CLI and service for log triage at ingest: it collapses a stream into Drain templates, asks Jev a policy-driven set of typed questions once per new pattern, and routes every line to page, ticket or log.
- Stars
- 4
- Language
- Rust
- License
- MIT
- Reading time
- 2 min
- Published by
- Community
- Author
- tpateeq
- Last verified
- Oct 2026
Used inJev for Software & DevTools
- Languages
- Rust
- Capabilities
- Open sourceSelf-hostedRequires API key
Highlights
- The author's run collapsed 22,833,750 log lines into 11,812 templates and 13,080 Jev calls for $0.64.
- Each template gets four typed questions: pageable and detail as Noul, severity as a 0–3 Score, area as Choice; attention is computed in code.
- Numbers, IPs, UUIDs, hex values and emails are masked first; HTTP status classes are preserved, so 5xx never merges with 200s.
- Routes follow a paging policy in plain English: at attention ≥0.75 page, ≥0.5 ticket, otherwise log — pages at most once per pattern per cooldown.
- Serve mode accepts OTLP/HTTP JSON logs or plain NDJSON lines and emits Slack-compatible webhook payloads with template, count, severity and area.
Quickstart
bash
cargo install --git https://github.com/TPAteeq/tocsin
export TYPESAFE_API_KEY=...
kubectl logs deploy/api --since=1h | tocsin triageWatch out
Copy reviewed against the repo README on 2026-10-15; the capture ends at the webhook payload table. The cost comparison figures are the author's own single run, and the README links a full write-up at tpateeq.github.io/tocsin that includes a run where the approach lost.
Questions about this entry
Short answers drawn from the linked project or page.
A Rust tool for log triage at ingest: it groups a log stream into patterns with masking and Drain templating, asks Jev one question set per new pattern, and routes each line to page, ticket or log.
One request per new template carries your plain-English policy plus four typed questions: pageable and detail as Noul, severity as a 0–3 Score and area as a Choice. Code owns the final decision: attention = pageable × (1 − detail).
The README reports 22,833,750 lines → 11,812 templates → 13,080 Jev calls → $0.64. The same calls through a $3/M model are estimated at $45.82, and asking about every line instead of every template at $1,120.
Numbers, IPs, UUIDs, hex values and emails are masked before templating, and Jev sees one masked template per pattern plus your policy — never the raw log stream. HTTP status classes are preserved during masking.
cargo install --git https://github.com/TPAteeq/tocsin, set TYPESAFE_API_KEY, then pipe logs in: kubectl logs deploy/api --since=1h | tocsin triage. A Docker image is planned once a tagged release publishes.
The default policy routes attention ≥0.75 to page, ≥0.5 to ticket, otherwise log. tocsin triage prints page and ticket by default (--only page,ticket,log changes that), and serve mode posts pages to a webhook once per pattern per cooldown.
The README links a full write-up, including the run where tocsin lost. The captured README was truncated after the webhook section, and severity and area thresholds are not described there. It is a small, single-author project last pushed 2026-09-18.
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