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loom-architecture

Apply the repository-wide Loom Architecture—Log-Oriented Outcomes and Materializations—when designing, implementing, reviewing, debugging, or documenting NATS and JetStream event-sourced applications. Use for work involving NATS account boundaries, a primary event stream, optimistic concurrency control, projections and read-your-writes, snapshots or checkpoints, snapshot repositories, durable workers, or reliable external effects.

Quality

78%

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tessl review fix ./.agents/skills/loom-architecture/SKILL.md
SKILL.md
Quality
Evals
Security

Quality

Content

61%Weight 40%Scale 1-5

Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.

The body is a clean, well-structured conceptual overview that avoids padding and clearly separates framework mechanics from application responsibilities. Its weakness is practical: as an architecture guide for designing, implementing, and debugging, it describes the 'what' well but gives little executable 'how'—no code for OCC appends, consumer setup, or projection bases—and no explicit procedure or checklist for applying it. Storage-convention rules are the most actionable part.

Suggestions

Add a short executable example of the core mechanics, e.g., a JetStream publish with expected last sequence for OCC and creation of a named durable consumer, so 'commands append new events only if the relevant history has not changed' becomes copy-paste guidance.

Include an explicit apply-it workflow, such as a step sequence for building a Loom app (define events -> declare the EVT stream -> command handler with OCC -> projection -> durable worker) or a review checklist derived from the storage-conventions bullets.

Consider moving a few concrete projection-base or snapshot-repository pointers into a references/ file (or briefly showing their interfaces inline) so 'A Loom framework can provide reusable projection bases... plus snapshot repository interfaces' has a discoverable follow-up.

DimensionReasoningScore

Conciseness

Roughly 80 lean lines with clear sections and no explanations of concepts Claude already knows (no NATS/protobuf tutorials); the ASCII diagram earns its place. Minor trimming possible—the closing "In short" paragraph restates the three preceding sections.

4 / 5

Actionability

The storage-conventions section offers concrete rules ("Classify OCC conflicts with `jetstreamutil.IsSequenceConflict`, and read the key again after a `Create` conflict", "Encode new records as protobuf from the package for their storage contract"), but much of the body is conceptual description with no executable examples—an OCC append (e.g., publish with expected last sequence) or durable-consumer configuration is never shown. Not 2 because real concrete guidance exists; not 4 because the 'how' is missing.

3 / 5

Workflow Clarity

The diagram implies a logical flow (commands -> event log -> materializations/workers) and sections are well ordered, but there is no explicit procedure for applying the architecture (e.g., a build-an-app step sequence or a design/review checklist) and no validation checkpoints, leaving the sequence implicit.

3 / 5

Progressive Disclosure

Well-organized self-contained sections with one clearly signaled one-level-deep reference (ADR-114 for storage rules). Slightly over the under-50-line simple-skill bar, and the only deep-dive pointer is a repo-relative path outside the skill bundle (no reference files exist in references/), so it falls just short of the top anchor.

4 / 5

Total

14

/

20

Passed

Description

87%Weight 40%Scale 1-5

Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.

The description is well-crafted: third-person voice, a clear what-and-when structure, an explicit 'Use for' clause, and rich domain-specific trigger terms. It occupies a distinct niche with minimal conflict risk, with only minor room to add synonymous trigger phrasing.

DimensionReasoningScore

Specificity

Names several specific activities ("designing, implementing, reviewing, debugging, or documenting") and many concrete domain artifacts (event stream, OCC, projections, snapshots, durable workers), but the core action is a single abstract verb ("Apply the repository-wide Loom Architecture") rather than multiple concrete operations.

4 / 5

Completeness

Explicitly answers both: what ("Apply the repository-wide Loom Architecture—Log-Oriented Outcomes and Materializations—") and when ("Use for work involving NATS account boundaries, a primary event stream, optimistic concurrency control...") with concrete trigger phrases, matching the top anchor rather than 4 where the 'when' could be more explicit.

5 / 5

Trigger Term Quality

Strong natural keyword coverage ("NATS account boundaries", "optimistic concurrency control", "projections and read-your-writes", "snapshots or checkpoints", "durable workers") that a developer on this stack would actually say, though a few common synonyms like "read models", "event sourcing", or "consumers" are missing.

4 / 5

Distinctiveness Conflict Risk

A named niche architecture tied specifically to NATS and JetStream event-sourced applications with distinct trigger concepts; virtually no overlap risk with generic skills.

5 / 5

Total

18

/

20

Passed

Validation

93%

Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.

Validation — 15 / 16 Passed

Validation for skill structure

CriteriaDescriptionResult

relative_links

Relative link issues: 1 suspicious

Warning

Total

15

/

16

Passed

Repository

chattocorp/chatto

Path

.agents/skills/loom-architecture/SKILL.md

Reviewed

Table of Contents

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