Crate tailtriage_analyzer 

tailtriage-analyzer

tailtriage-analyzer is the in-process analyzer/report crate for tailtriage.

Use this crate when you already have a completed tailtriage_core::Run in memory (or an equivalent stable snapshot) and want a typed triage report, text rendering, and canonical Report JSON rendering in your Rust process.

What this crate does

• analyzes one completed run/snapshot in batch
• returns a typed Report with evidence-ranked suspects and next checks
• renders human-readable output with render_text(&Report)
• renders canonical Report JSON with render_json(&Report) and render_json_pretty(&Report)
• provides analyze+render helpers: analyze_run_json and analyze_run_json_pretty

Suspects are investigation leads, not proof of root cause.

tailtriage-analyzer accepts any tailtriage_core::Run value. It is intended for completed/finalized captures or stable snapshots; callers that require finalized artifacts should validate that separately.

Installation

cargo add tailtriage-analyzer

You also need a capture crate that provides tailtriage_core::Run, such as tailtriage or tailtriage-core.

How to obtain a Run

tailtriage-analyzer does not capture requests and does not load artifacts from disk.

Typical flow:

• capture/integration crates (tailtriage, tailtriage-core, tailtriage-controller, tailtriage-tokio, tailtriage-axum) produce completed runs or saved artifacts
• tailtriage-analyzer analyzes completed in-memory runs or stable snapshots in process
• tailtriage-cli loads saved artifacts from disk and invokes tailtriage-analyzer

In-process API

use tailtriage_analyzer::{analyze_run, render_json_pretty, render_text, AnalyzeOptions};
use tailtriage_core::Run;

fn render_report(run: &Run) -> Result<String, Box<dyn std::error::Error>> {
    let report = analyze_run(run, AnalyzeOptions::default());
    let text = render_text(&report);
    let json = render_json_pretty(&report)?;
    Ok(format!("{text}\n\n{json}"))
}

Report contract

• analyze_run currently returns Report directly and is currently infallible
• AnalyzeOptions::default() is the normal path today and leaves room for future analyzer options
• Report is the typed analyzer output model and should be your primary integration surface
• render_text is for human-readable triage output
• render_json and render_json_pretty are canonical Report JSON renderers
• analyze_run_json and analyze_run_json_pretty combine analysis + canonical JSON rendering
• Report JSON is analyzer output and is distinct from raw Run artifact JSON input

Semantics and boundaries

• batch/snapshot analysis of one completed run
• not streaming analysis
• artifact loading from disk is CLI-owned (tailtriage-cli)
• CLI --format json uses the same canonical pretty Report JSON rendering path

Report fields (overview)

Report includes request counts, latency percentiles, queue/service share summaries, warnings, evidence quality, ranked suspects, and optional supporting route/temporal sections.

How to interpret a report

• primary_suspect is the strongest triage lead for the analyzed run, not proof of root cause.
• secondary_suspects are lower-ranked leads worth checking when evidence is close or the primary lead does not explain the incident.
• evidence[] explains why a suspect was ranked.
• next_checks[] gives targeted follow-up actions.
• score ranks suspects inside one report; it is not a probability.
• confidence is ranking strength and may be capped by missing, sparse, partial, or truncated evidence.
• warnings[] and evidence_quality describe interpretation limits.
• route_breakdowns and temporal_segments, when present, are supporting context only and do not override the global primary_suspect.
• Report JSON is analyzer output and is distinct from raw Run artifact JSON.

Migration note

// Old pre-0.1.x API was hosted in the CLI crate.
// Use the analyzer crate directly for in-process analysis/report APIs.

use tailtriage_analyzer::{analyze_run, render_text, AnalyzeOptions};

Structs

AnalyzeOptions

Options for heuristic run analysis.

Analyzer

Reusable analyzer configured with AnalyzeOptions.

EvidenceQuality

Structured capture-coverage and interpretation-quality summary.

InflightTrend

Summary of one dominant in-flight gauge trend over the run window.

Report

Rule-based triage report for one completed Run snapshot.

RouteBreakdown

Supporting per-route triage summary derived from captured request route labels.

Suspect

Evidence-ranked suspect produced by heuristic analysis.

TemporalSegment

Supporting early/late temporal triage summary for one run.

Enums

Confidence

Confidence bucket derived from suspect score thresholds.

DiagnosisKind

Evidence-ranked diagnosis categories produced by heuristic triage.

EvidenceQualityLevel

Overall evidence-quality level for this capture.

SignalCoverageStatus

Coverage status for one signal family.

Functions

analyze_run

Analyzes one completed Run with rule-based heuristics and returns a triage report.

analyze_run_json

Analyzes one in-memory Run and returns compact analyzer Report JSON.

analyze_run_json_pretty

Analyzes one in-memory Run and returns canonical pretty analyzer Report JSON.

render_json

Renders analyzer Report JSON in compact form.

render_json_pretty

Renders analyzer Report JSON in canonical pretty form.

render_text

Renders a compact text triage summary from a Report.