Matías Aguirre

FOSS developer · Linux since 1996 · SNOMED · LOINC · Neo4j · knowledge graphs · self-hosted everything

[Matías Aguirre @fastslack]

Estamos llegando al umbral donde cuanta mas "inteligencia" le agreguen a la mal llamada IA, mas lenta y estúpida se va a hacer.

[Matías Aguirre @fastslack]

@dejavucoder they do not want max planners any more

[Matías Aguirre @fastslack]

@m13v_ Agreed, page-wide assert_text is the coarse end. That's what assert_element_text and assert_text_in are for: the check is pinned to a selector/container, so nothing upstream can satisfy it by accident. Scoped asserts + a visual expect is the combo that's held up best for me.

[Matías Aguirre @fastslack]

I told Claude "write an E2E test for the login flow" — and it wrote, ran, and debugged the test by itself. In JSON. No test code.

This is e2e-runner: an MCP server that gives your AI agent a full browser-testing toolkit. 🧵

[Matías Aguirre @fastslack]

@m13v_ The gate is the assertions, the rewrite touches the selector, never them. Wrong element -> downstream assert_url/assert_text fail, and `expect` judges the end state visually. By your own framing: intent lives in the assertion. Fair push though, noted for the roadmap 🤝

[Matías Aguirre @fastslack]

@m13v_ Tracking doesn't patch the symptom — it's the input the agent uses to fix the cause. A selector goes flaky, the learning system flags it, Claude rewrites it in the spec, re-runs, confirms green. The diagnosis lands on the agent, not on a human. You review a one-line diff.

[Matías Aguirre @fastslack]

True of every runner. Playwright's auto-wait internals aren't in your diff either. The question is what you get when it breaks: auto error screenshot, step-by-step narrative, per-run network logs, and a learning system tracking which selectors go flaky across runs. That's the "why". Still plenty to improve there.

[Matías Aguirre @fastslack]

@m13v_ The JSON is plain text in your repo — it greps, diffs and code-reviews like any file. And it runs in CI: exit 1 on failure, report.json artifact. Unknown actions fail at load time with exact file+test location. "Opaque" is the one thing it isn't 🙂 Good luck with assrt 🤝

[Matías Aguirre @fastslack]

Open source, Apache-2.0. Works with Claude Code, OpenCode, or any MCP client.

claude mcp add e2e-runner -- npx -y -p @matware/e2e-runner e2e-runner-mcp

https://t.co/XOIJYtG9ur

[Matías Aguirre @fastslack]

Hot take: E2E test code is a liability. The spec — "user logs in, sees dashboard" — is the asset. Everything else should be generated.

What's the most painful E2E suite you've ever had to maintain?

[Matías Aguirre @fastslack]

Hoy se fue uno de los artistas nacionales mas grande de la historia. Hay que dejarnos de politizar absolutamente todo.

Que Dios te tenga en su cobijo, Indio querido. 😢

[Matías Aguirre @fastslack]

@Tomidiazcueto @C5N jajaj tas igual

[Matías Aguirre @fastslack]

Same principle here, terminology layer: OpenMed NER detects entities in free-text notes, then we link to real SNOMED/ANMAT concepts. The LLM only picks an index among real candidates, it can't emit a code. No match -> we label the gap ("unmapped, search manually"), never invent a SCTID. Refusal as architecture, not behavior.

[Matías Aguirre @fastslack]

Heural is in production with real institutions, daily clinical use on FHIR R4 + SNOMED CT + LOINC. OpenMed integration is still in research/dev for us: clinical NER + PHI de-identification on Spanish notes.

SNOMED CT is our main coding base in Heural, how's your SNOMED development coming along? On the OpenMed front we already finished lab / blood-test extraction with full LOINC coding. Curious how your HCC-agent + high-throughput retrieval design translates to SNOMED retrieval.

[Matías Aguirre @fastslack]

@MaziyarPanahi @huggingface Thanks Maziyar! Heural is a FHIR R4 EHR — SNOMED CT + LOINC bindings, every patient modeled as a clinical graph in Neo4j. OpenMed powers our clinical NLP: auto-coding free-text notes to standard terminologies and de-identifying PHI before it leaves the clinical boundary.