Struct ServerRunnerMetrics 

pub struct ServerRunnerMetrics {
    pub success: bool,
    pub steps_executed: usize,
    pub tokens_input: u64,
    pub tokens_output: u64,
    pub anchor_breaches: usize,
    pub step_names: Vec<String>,
    pub step_results: Vec<String>,
    pub per_step_chunks: Vec<Vec<String>>,
    pub provenance_events: Vec<String>,
    pub blame_attribution: Option<BlameContext>,
    pub epistemic_envelopes: Vec<EpistemicEnvelope>,
}

Fields

success: bool

steps_executed: usize

tokens_input: u64

tokens_output: u64

anchor_breaches: usize

step_names: Vec<String>

step_results: Vec<String>

per_step_chunks: Vec<Vec<String>>

Per-step token chunks for streaming (simulated from step results).

provenance_events: Vec<String>

§Fase 39.c.y — semantic provenance events captured during flow execution. Each entry is a kind:identifier slug (closed taxonomy enforced by producer sites):

• retrieve:<store> — Pillar II store read
• persist:<store> — Pillar II store insert
• mutate:<store> — Pillar II store update
• purge:<store> — Pillar II store delete
• shield:<name>@<step> — Pillar I shield invocation
• ots:<name>@<step> — OTS apply
• mandate:<name>@<step> — mandate apply
• compute:<name>@<step> — compute apply
• lambda_apply:<name>@<step> — lambda data apply The wire envelope’s provenance_chain is built from [flow:F, …events…, step:S0, step:S1, …, backend:B]. Empty for trivial flows; populated by [emit_provenance_event] at the runtime sites.

blame_attribution: Option<BlameContext>

§Fase 39.c.z — closed-catalog blame attribution from runtime degradation events. Populated when:

• an anchor with severity != “error” fires (degraded path proceeds)
• a shield flags content but flow proceeds
• a store mutation chain verification fails AND flow proceeds with prior-state read
• a backend returns truncated / partial response
• D5 detects a recoverable type mismatch None on the clean happy path. The first surfaced blame wins (subsequent events are recorded in audit_log but do not overwrite the primary attribution).

epistemic_envelopes: Vec<EpistemicEnvelope>

§Fase 55.b — the Theorem 5.1 (base, scope, confidence) triple of every flow-level use <Tool> dispatch whose tool declares an epistemic:<level> effect. Derived from the IR via crate::epistemic_capture::collect_for_flow — the same function the streaming path calls, so both transports surface byte-identical envelopes (§55.c parity). Empty for flows with no epistemic tool.