Conciseness

Mostly lean: each step is a compact table or code block with minimal prose ('Maintenance windows + planned outages: agreed-upon exclusions matter. Test the rule.'). However, repeated provenance quotations ('Per [Google SRE - Embracing Risk]: "A failure affecting 0.0002% of queries consumes 20% of a 0.001% quarterly budget."') and the opening epigraph could be trimmed — minor over-explanation, so not 5; well above 3 since no section teaches concepts Claude already knows.

Actionability

Eight concrete test examples with exact thresholds and expected values ('monthly_budget_min = 30 * 24 * 60 * 0.001 # 43.2 min', 'error_rate_in_window = 0.0144'), plus precise burn-rate window tables. Not 5: helpers like BudgetTracker(...), burn_rate_alert(...), and compute_sli(...) are undefined templates depending on the user's infrastructure, so the code is not copy-paste executable; not 3 because the code is real, syntactically valid test syntax with precise assertions rather than pseudocode.

Workflow Clarity

Steps 1-8 form a clear, logical build sequence (define SLI/SLO → test SLI calculation → budget consumption → burn-rate alerting → freeze trigger → window reset → multi-window → reporting), each with concrete pass criteria, and the Anti-patterns table maps failures back to fix steps ('Single burn-rate alert | Either too noisy or too late | Step 7 multi-window'). Not 5: there is no explicit run-the-suite/verify loop or error-recovery checkpoint (e.g., what to do when a gate test fails in CI), and Step 4's 'Test both directions' is the only negative-case instruction.

Progressive Disclosure

Appropriately split: the core error-budget test workflow lives in SKILL.md, while the distinct incident-metrics material (schema, formulae, dashboards) is correctly factored into a real, one-level-deep bundle file, clearly signaled as '[references/mttr-mtbf.md](references/mttr-mtbf.md) - incident metrics that consume budget: MTTR / MTBF / MTTD / MTTA schema, formulae, and dashboards-as-code'. Sections are well-organized with headers, tables, and code; no buried or nested references. Verified the referenced file exists in the bundle.

Specificity

Lists multiple concrete actions — 'Build error-budget gate tests', 'burn-rate alerting; monthly-budget exhaustion test; freeze-trigger when budget consumed', 'per-incident record schema, calculation formulae, exclusion rules, dashboards-as-code, and target-vs-actual alerting' — comprehensively covering the skill's domain. Not 4: the action list has no material coverage gaps.

Completeness

Explicitly answers both: what ('Build error-budget gate tests - SLO + error-budget calculation ... freeze-trigger when budget consumed') and when ('Use when an SLO and error budget are written down but nothing verifies that burn-rate alerts fire or that the release freeze engages ... or when MTTR / MTBF dashboards report numbers nobody can reproduce'). Both are concrete and explicit with trigger phrases.

Trigger Term Quality

Natural SRE vocabulary users would say — 'SLO', 'error budget', 'burn-rate alerts', 'release freeze', 'MTTR / MTBF dashboards' — with an explicit trigger scenario clause. Not 5: common synonyms like 'service level objective', 'SLA', 'uptime target', and 'reliability' are missing; clearly above 3 because the terms present are the ones practitioners actually use.

Distinctiveness Conflict Risk

'error-budget gate tests' with burn-rate/freeze triggers is a clear niche with minimal conflict risk, but the second half ('Includes the incident-metrics reference for MTTR / MTBF / MTTD / MTTA ... dashboards-as-code') broadens scope into territory a standalone incident-metrics skill would own — minor overlap risk with closely related skills, so not 5.