type: user

role: user

content:
Du recherchierst Firmendaten für einen luxemburgischen B2B-Kunden eines Handwerksgroßhändlers. Nutze aktiv WebSearch und WebFetch (falls diese Tools als "deferred tool" erscheinen, lade sie zuerst per ToolSearch mit "select:WebSearch,WebFetch"). Führe mehrere gezielte Suchanfragen durch.

Firma: "Steffen Holzbau SA"
Adresse: Rue Flaxweiler 13, PLZ 6776, Region Grevenmacher, Luxemburg (LU)
Hinweis: "Holzbau" = Holzbau/Zimmerei-Unternehmen, Familienname vermutlich "Steffen".

Recherchequellen: RCS Luxembourg (Registre de Commerce et des Sociétés, rcsl.lu / lbr.lu), Luxemburgisches Amtsblatt (Mémorial), editus.lu (Branchenverzeichnis Luxemburg), Google, offizielle Firmenwebsite (z.B. steffen-holzbau.lu falls existent).

Finde heraus:
1. Exakter offizieller Firmenname und Rechtsform (SA laut Name, verifizieren)
2. RCS-Nummer (Format Bxxxxxx)
3. Branche/Tätigkeit (NACE-Code und Klartext) - Holzbau, Zimmerei, Dachdeckerei in Holzbauweise
4. Gründungsjahr
5. Mitarbeiterzahl-Größenklasse (falls verfügbar, sonst grob schätzen)
6. Umsatzgrößenklasse in EUR (falls verfügbar, sonst grobe Schätzung mit Kennzeichnung)
7. Bestätigung ob Adresse "Rue Flaxweiler 13, 6776" (Gemeinde Grevenmacher/Flaxweiler) zur gefundenen Firma passt
8. Website-URL falls vorhanden
9. Kanton/Distrikt (Luxemburg: Distrikt Grevenmacher, Kanton Grevenmacher bei PLZ 6776)

Gib am Ende GENAU EIN JSON-Objekt zurück (keine Codefences, kein Fließtext drumherum) mit exakt diesen Feldern:
{
  "kunde_id": 1012,
  "branche_nace": "...",
  "branche_text": "...",
  "gewerk": "Holz-Zimmerei",
  "segment": "Handwerk",
  "mitarbeiter_kl": "...",
  "umsatz_kl": "... Mio EUR",
  "gruendungsjahr": Zahl oder null,
  "rechtsform": "SA",
  "website": "...",
  "ort": "...",
  "bundesland": "Distrikt Grevenmacher",
  "hr_nummer": "...",
  "konfidenz": 0.0-1.0,
  "bestaetigt": 0 oder 1,
  "quelle_primaer": "...",
  "belege": "kurzer Klartext, KEINE HTML-Entities (& nicht &)"
}

Wenn die Firma nicht eindeutig identifizierbar ist: trotzdem das JSON-Objekt liefern, mit gewerk="Sonstige", konfidenz < 0.3, bestaetigt=0, belege erklärt die Unsicherheit. Erfinde keine Handelsregisternummern oder Gründungsjahre.

userType: external

entrypoint: cli

gitBranch: main

slug: lucky-discovering-sparrow


addedNames: EnterWorktree ExitWorktree Monitor NotebookEdit SendMessage TaskStop WebFetch WebSearch

type: attachment


content:
- git-sync: Commit + Push aller persistent konfigurierten Projekt-Repos
- deep-research: Deep research harness — fan-out web searches, fetch sources, adversarially verify claims, synthesize a cited report. - When the user wants a deep, multi-source, fact-checked research report on any topic. BEFORE invoking, check if the question is specific enough to research directly — if underspecified (e.g., "what car to buy" without budget/use-case/region), ask 2-3 clarifying questions to narrow scope. Then pass the refined question as args, weaving the answers in.
- dataviz: Use this skill whenever you are about to create ANY chart, graph, plot, dashboard, or data visualization, in ANY output medium — an HTML or React artifact, inline SVG, plotting code in any library (matplotlib, plotly, d3, Recharts, …), an image/PNG you will render and upload, or a chart shared into Slack. Read it BEFORE writing the first line of chart code, choosing chart colors, building a stat tile / meter / KPI row, or laying out a dashboard. Produces visualizations that read as one system — elegant, accessible, consistent in light and dark — using a brand-neutral placeholder palette you swap for your own. Teaches a design-system-agnostic method: a form heuristic, a color formula with a runnable validator, mark specs, and interaction rules. A validated default palette is documented in `references/palette.md` — swap that file's values for your brand's. Triggers on: "chart", "graph", "plot", "data viz", "visualization", "dashboard", "analytics", "visualize data", "categorical colors", "sequential / diverging palette", "stat tile", "sparkline", "heatmap", "legend", "axis", "tooltip", "chart colors", "color by series".
- artifact-design: Design guidance and fundamentals for Artifacts.
- update-config: Use this skill to configure the Claude Code harness via settings.json. Automated behaviors ("from now on when X", "each time X", "whenever X", "before/after X") require hooks configured in settings.json - the harness executes these, not Claude, so memory/preferences cannot fulfill them. Also use for: permissions ("allow X", "add permission", "move permission to"), env vars ("set X=Y"), hook troubleshooting, or any changes to settings.json/settings.local.json files. Examples: "allow npm commands", "add bq permission to global settings", "move permission to user settings", "set DEBUG=true", "when claude stops show X". For simple settings like theme/model, suggest the /config command.
- keybindings-help: Use when the user wants to customize keyboard shortcuts, rebind keys, add chord bindings, or modify ~/.claude/keybindings.json. Examples: "rebind ctrl+s", "add a chord shortcut", "change the submit key", "customize keybindings".
- verify: Verify that a code change actually does what it's supposed to by exercising it end-to-end and observing behavior — drive the affected flow, not just tests or typecheck. Run before committing nontrivial changes; bootstraps this repo's project verify skill if none exists yet. Don't invoke it on a diff that only touches tests, docs, or other code with no runtime surface to drive (a change to product source always has one) — there's nothing to observe.
- code-review: Review the current diff for correctness bugs and reuse/simplification/efficiency cleanups at the given effort level (low/medium: fewer, high-confidence findings; high→max: broader coverage, may include uncertain findings; ultra: deep multi-agent review in the cloud). Pass --comment to post findings as inline PR comments, or --fix to apply the findings to the working tree after the review.
- simplify: Review the changed code for reuse, simplification, efficiency, and altitude cleanups, then apply the fixes. Quality only — it does not hunt for bugs; use /code-review for that.
- fewer-permission-prompts: Scan your transcripts for common read-only Bash and MCP tool calls, then add a prioritized allowlist to project .claude/settings.json to reduce permission prompts.
- loop: Run a prompt or slash command on a recurring interval (e.g. /loop 5m /foo). Omit the interval to let the model self-pace. - When the user wants to set up a recurring task, poll for status, or run something repeatedly on an interval (e.g. "check the deploy every 5 minutes", "keep running /babysit-prs"). Do NOT invoke for one-off tasks.
- schedule: Create, update, list, or run scheduled cloud agents (routines) that execute on a cron schedule. - When the user wants to schedule a recurring cloud agent, set up automated tasks, create a cron job for Claude Code, or manage their scheduled agents/routines. Also use when the user wants a one-time scheduled run ("run this once at 3pm", "remind me to check X tomorrow").
- claude-api: Reference for the Claude API / Anthropic SDK — model ids, pricing, params, streaming, tool use, MCP, agents, caching, token counting, model migration.
TRIGGER — read BEFORE opening the target file; don't skip because it "looks like a one-liner" — whenever: the prompt names Claude/Anthropic in any form (Claude, Anthropic, Fable, Opus, Sonnet, Haiku, `anthropic`, `@anthropic-ai`, `claude-*`, `us.anthropic.*`, `[1m]`); the user asks about an LLM (pricing/model choice/limits/caching) — never answer from memory; OR the task is LLM-shaped with provider unstated (agent/MCP/tool-definition/multi-agent/RAG/LLM-judge/computer-use; generate/summarize/extract/classify/rewrite/converse over NL; debugging refusals/cutoffs/streaming/tool-calls/tokens).
SKIP only when another provider is being worked on (overrides all triggers): OpenAI/GPT/Gemini/Llama/Mistral/Cohere/Ollama named in the query; OR `grep -rE 'openai|langchain_openai|google.generativeai|genai|mistralai|cohere|ollama'` over the project hits (run this grep FIRST if no provider named — don't Read the file).
- run: Launch and drive this project's app to see a change working. Use when asked to run, start, or screenshot the app, or to confirm a change works in the real app (not just tests). First looks for a project skill that already covers launching the app; otherwise falls back to built-in patterns per project type (CLI, server, TUI, Electron, browser-driven, library).
- init: Initialize a new CLAUDE.md file with codebase documentation
- review: Review a GitHub pull request; for your working diff use /code-review
- security-review: Complete a security review of the pending changes on the current branch

names: git-sync deep-research dataviz artifact-design update-config keybindings-help verify code-review simplify fewer-permission-prompts loop schedule claude-api run init review security-review


type: message

role: assistant

type: thinking

service_tier: standard

attributionAgent: general-purpose

type: assistant


ToolSearch

query: select:WebSearch,WebFetch

type: direct

speed: standard


tool_name: WebSearch

tool_name: WebFetch

matches: WebSearch WebFetch

query: select:WebSearch,WebFetch


WebSearch

query: Steffen Holzbau SA Flaxweiler Luxembourg


query: "Steffen Holzbau" RCS Luxembourg


query: Steffen Holzbau editus.lu


content:
Web search results for query: "Steffen Holzbau SA Flaxweiler Luxembourg"

Links: [{"title":"Steffen Holzbau | Baudienstleister | Wir bauen die Zukunft","url":"https://www.steffen-holzbau.lu/"},{"title":"Steffen Holzbau | Kontakt | Wir bauen die Zukunft","url":"https://www.steffen-holzbau.lu/kontakt/"},{"title":"Steffen Holzbau | Individuelle Holzbauideen | Wir bauen die Zukunft","url":"https://www.steffen-holzbau.lu/impressum/"},{"title":"Steffen Holzbau | Paperjam Bible | Paperjam Bible","url":"https://en.paperjam.lu/guide/organisation/01273178514/steffen-holzbau"},{"title":"Steffen Holzbau SA - Timber beams - Treatment Grevenmacher","url":"https://www.editus.lu/en/steffen-holzbau-sa-grevenmacher-4019"},{"title":"steffen holzbau s.a. Team","url":"http://steffen-sa.com/eo/cms?_SID=NEW&_sprache=de&_bereich=artikel&_aktion=suche_rubrik&idrubrik=1004&_seitenlaenge=200&_template_variant=company&_template_variant2=Team"},{"title":"Steffen Holzbau | Unsere Leistungen | Portfolio des Baudienstleisters","url":"https://www.steffen-holzbau.lu/portfolio/"},{"title":"Steffen Holzbau Sa","url":"https://www.datocapital.lu/companies/Steffen-Holzbau-Sa.html"},{"title":"Projekte Archiv - Steffen Holzbau","url":"https://www.steffen-holzbau.lu/project/"}]

Based on the search results, here's what I found about Steffen Holzbau SA:

Steffen Holzbau S.A. is located at 13, rue de Flaxweiler, L-6776 Grevenmacher, Luxembourg. (Note: Flaxweiler is a location within Grevenmacher, not a separate address.)

The company is an innovative construction service provider with strong engineering expertise that develops customized wood construction solutions at the highest level.

With expertise and experience from 30 years, they serve as reliable partners for architects, construction companies, engineers, and public contractors.

Their services include wooden bridges, metal and foil roofs, general contracting, engineer timber construction, passive/plus-energy buildings, and hall and industrial construction.

They primarily work in Luxembourg, Rhineland-Palatinate, and Saarland.

The company was created in 1991, with Stephan Hostert serving as Administrateur délégué (delegated administrator), and its trade register number is B45638.

REMINDER: You MUST include the sources above in your response to the user using markdown hyperlinks.

query: Steffen Holzbau SA Flaxweiler Luxembourg

title: steffen holzbau s.a. Team

title: Steffen Holzbau Sa

title: Projekte Archiv - Steffen Holzbau


content:
Web search results for query: ""Steffen Holzbau" RCS Luxembourg"

Links: [{"title":"Steffen Holzbau SA, Grevenmacher, Luxembourg","url":"https://www.northdata.com/Steffen%20Holzbau%20SA,%20Grevenmacher/B45638"},{"title":"Steffen Holzbau | Individuelle Holzbauideen | Wir bauen die Zukunft","url":"https://www.steffen-holzbau.lu/impressum/"},{"title":"Steffen Holzbau SA - Timber beams - Treatment Grevenmacher","url":"https://www.editus.lu/en/steffen-holzbau-sa-grevenmacher-4019"},{"title":"Steffen Holzbau Sa","url":"https://www.datocapital.lu/companies/Steffen-Holzbau-Sa.html"},{"title":"Steffen Holzbau S.a., 13, Rue De Flaxweiler , N° REGISTRE ...","url":"https://lu.kompass.com/c/steffen-holzbau-s-a/lur012571/"},{"title":"Steffen Holzbau | Paperjam Bible | Paperjam Bible","url":"https://en.paperjam.lu/guide/organisation/01273178514/steffen-holzbau"},{"title":"Steffen Holzbau | Kontakt | Wir bauen die Zukunft","url":"https://www.steffen-holzbau.lu/kontakt/"},{"title":"Holzbau Lëtzebuerg ASBL, Luxembourg, RCS F4504: Network, Financial information","url":"https://www.northdata.com/Holzbau%20L%C3%ABtzebuerg%20ASBL,%20Luxembourg/F4504"},{"title":"STEFFEN HOLZBAU S.A. - SIRET 482 620 887 00018","url":"https://annuaire-entreprises.data.gouv.fr/etablissement/48262088700018"},{"title":"Holzbau Bissen Sàrl, Koetschette, Luxembourg, RCS B251192: Network, Financial information","url":"https://www.northdata.com/Holzbau%20Bissen%20S%C3%A0rl,%20Koetschette/B251192"}]

Based on the search results, I found information about Steffen Holzbau and its RCS Luxembourg registration:

Steffen Holzbau SA is located in Grevenmacher, Luxembourg, with RCS B45638. The company was created in 1991, with Stephan Hostert as the Administrateur délégué.

Steffen Holzbau offers everything from construction of private flats to large halls, including engineer timber construction, energy houses, solid timber construction, carpentry work, roofing work, and various other specialized construction services.

The company is located at 13, rue de Flaxweiler, L-6776 Grevenmacher, with phone number +352 719686-0.

REMINDER: You MUST include the sources above in your response to the user using markdown hyperlinks.

query: "Steffen Holzbau" RCS Luxembourg

title: Steffen Holzbau Sa


content:
Web search results for query: "Steffen Holzbau editus.lu"

Links: [{"title":"Steffen Holzbau SA - Timber beams - Treatment Grevenmacher","url":"https://www.editus.lu/en/steffen-holzbau-sa-grevenmacher-4019"},{"title":"Steffen Holzbau | Baudienstleister | Wir bauen die Zukunft","url":"https://www.steffen-holzbau.lu/"},{"title":"Steffen Holzbau | Kontakt | Wir bauen die Zukunft","url":"https://www.steffen-holzbau.lu/kontakt/"},{"title":"Steffen Holzbau | Unsere Leistungen | Portfolio des Baudienstleisters","url":"https://www.steffen-holzbau.lu/portfolio/"},{"title":"Aktuelles - Steffen Holzbau","url":"https://www.steffen-holzbau.lu/aktuelles/"},{"title":"Steffen Holzbau | Jobs | Wir bauen die Zukunft","url":"https://www.steffen-holzbau.lu/jobs/"},{"title":"Steffen Holzbau | Individuelle Holzbauideen | Wir bauen die Zukunft","url":"https://www.steffen-holzbau.lu/impressum/"},{"title":"Bereiche Archiv - Steffen Holzbau","url":"https://www.steffen-holzbau.lu/bereiche/"},{"title":"Steffen Holzbau | Unsere Projekte | Baudienstleister für Holz","url":"https://www.steffen-holzbau.lu/projekte/"},{"title":"Business Grevenmacher - Companies & professionals in Grevenmacher","url":"https://www.editus.lu/en/grevenmacher-314v/roofing-and-covering-services-447p"}]

Based on the search results, here's what I found about Steffen Holzbau on editus.lu:

Steffen Holzbau offers everything from construction of private flats to the construction of large halls or objects. The company is listed on editus.lu (a professional directory) and specializes in timber construction services.

Their services include engineer timber construction, energy houses, passive houses, low-energy houses, solid timber construction, carpentry work, roofing work, wooden terraces, wooden facades, wooden bridges, hall construction, industrial construction, and general contracting work.

The company is located in Grevenmacher, Luxembourg, and works primarily in Luxembourg, Rhineland-Palatinate and the Saarland. They emphasize modern architecture, innovative building materials, energy-efficient, sustainable construction and the latest technologies.

REMINDER: You MUST include the sources above in your response to the user using markdown hyperlinks.

query: Steffen Holzbau editus.lu

title: Aktuelles - Steffen Holzbau

title: Bereiche Archiv - Steffen Holzbau


type: text

text: Guter Treffer. Ich verifiziere noch Northdata (RCS-Details, NACE, Mitarbeiterzahl) und die Impressum-Seite der Firmenwebsite.


WebFetch

prompt: Extrahiere: exakter Firmenname, Rechtsform, RCS-Nummer, Adresse, Gründungsjahr/Eintragungsdatum, NACE-Code/Tätigkeit, Kapital, Geschäftsführer, Mitarbeiterzahl falls angegeben.


prompt: Extrahiere: exakter Firmenname, Rechtsform, RCS/Handelsregisternummer, Adresse, USt-ID, Geschäftsführer.


prompt: Extrahiere: Firmenname, Adresse, Branche/Tätigkeit, Mitarbeiterzahl falls angegeben, Kontaktdaten.


content:
# Steffen Holzbau SA - Unternehmensinfo

**Exakter Firmenname:** Steffen Holzbau SA

**Rechtsform:** "Société anonyme" (gemäß Publikation vom 12.08.2025)

**RCS-Nummer:** B45638

**Adresse:** "13, Rue de Flaxweiler, 6776 Grevenmacher, Luxembourg"

**Gründungsjahr/Eintragungsdatum:** 01.06.2005

**NACE-Code/Tätigkeit:** "Manufacture of other builders' carpentry and joinery" (Code 16.23)

**Kapital:** Nicht angegeben (nur für Premium-Abonnenten verfügbar)

**Geschäftsführer/Board Members:** Mark Weber, Matthias Hettinger, Stephan Hostert, Ferdinand Steffen

**Mitarbeiterzahl:** Nicht angegeben (nur für Premium-Abonnenten verfügbar)

**Zusatz:** Das Unternehmen hat mehrere Patente zu Holz-/Beton-Verbundbauteilen angemeldet und erhielt Staatshilfen für Forschung und Umweltschutz.

codeText: OK


content: unable to verify the first certificate

toolUseResult: Error: unable to verify the first certificate


content:
# Steffen Holzbau SA - Firmeninformationen

**Firmenname:** Steffen Holzbau SA

**Adresse:** 13 Rue de Flaxweiler, Potaschberg, L-6776 Grevenmacher (Gréiwemaacher), Luxemburg

**Branche/Tätigkeit:**
Das Unternehmen ist tätig in Holzbau und Dachdeckung. Die Spezialgebiete umfassen "Ingenieur-Holzbau, Holzhausbau, Terrasse, Holzbrücken" sowie Renovierung und modulare Vorfertigung.

**Mitarbeiterzahl:** Nicht öffentlich angegeben (Feld maskiert)

**Kontaktdaten:**
- Telefon: +352 71 96 86-0
- Website: https://www.steffen-holzbau.lu/
- Kontaktformular: https://www.steffen-holzbau.lu/kontakt
- Social Media: Facebook, LinkedIn, Instagram, YouTube (@steffen_holzbau)

**Geschäftsführer:**
- Mr. Stephan Hostert
- Mr. Mark Weber


prompt: Extrahiere Gründungsjahr, Mitarbeiterzahl, Umsatz, NACE/Branche, Rechtsform, RCS-Nummer der Firma Steffen Holzbau.


content:
# Steffen Holzbau - Unternehmensangaben

Basierend auf dem bereitgestellten Inhalt:

**Gründungsjahr:** 1991

**Mitarbeiterzahl:** 70 Arbeitnehmer in Luxemburg (Stand 2015)

**Umsatz:** Nicht verfügbar

**Branche/NACE:** "General contractors" (Allgemeine Bauunternehmer)

**Rechtsform:** Nicht angegeben

**RCS-Nummer:** B45638

**Zusätzliche Informationen:**
- VAT-Nummer: LU15848969
- Gründet wurde das Unternehmen 1991 und ist in Grevenmacher ansässig
- Geschäftsführer: Stephan Hostert (Administrateur délégué)


Bash

command:
cat <<'EOF'
{
  "kunde_id": 1012,
  "branche_nace": "16.23",
  "branche_text": "Herstellung von sonstigen Konstruktionsteilen aus Holz fuer das Bauwesen (Zimmerei, Ingenieur-Holzbau)",
  "gewerk": "Holz-Zimmerei",
  "segment": "Handwerk",
  "mitarbeiter_kl": "50-99",
  "umsatz_kl": "10-20 Mio EUR (Schaetzung)",
  "gruendungsjahr": 1991,
  "rechtsform": "SA",
  "website": "https://www.steffen-holzbau.lu",
  "ort": "Grevenmacher",
  "bundesland": "Distrikt Grevenmacher",
  "hr_nummer": "B45638",
  "konfidenz": 0.9,
  "bestaetigt": 1,
  "quelle_primaer": "Northdata (RCS Luxembourg B45638)",
  "belege": "Firma Steffen Holzbau SA, Adresse 13 Rue de Flaxweiler, L-6776 Grevenmacher, uebereinstimmend bestaetigt durch Northdata (RCS B45638, NACE 16.23), editus.lu, Firmenwebsite steffen-holzbau.lu und Paperjam Bible. Gegruendet 1991, RCS-Eintragung als SA vom 01.06.2005. Geschaeftsfuehrer laut RCS: Stephan Hostert, Mark Weber, Matthias Hettinger, Ferdinand Steffen. Mitarbeiterzahl laut Paperjam Bible 70 (Stand 2015), aktuelle Groessenklasse geschaetzt. Umsatz nicht oeffentlich verfuegbar, grobe Schaetzung anhand Mitarbeiterzahl und Branche."
}
EOF


branche_text: Herstellung von sonstigen Konstruktionsteilen aus Holz fuer das Bauwesen (Zimmerei, Ingenieur-Holzbau)

gewerk: Holz-Zimmerei

segment: Handwerk

umsatz_kl: 10-20 Mio EUR (Schaetzung)

rechtsform: SA

ort: Grevenmacher

bundesland: Distrikt Grevenmacher

quelle_primaer: Northdata (RCS Luxembourg B45638)

belege: Firma Steffen Holzbau SA, Adresse 13 Rue de Flaxweiler, L-6776 Grevenmacher, uebereinstimmend bestaetigt durch Northdata (RCS B45638, NACE 16.23), editus.lu, Firmenwebsite steffen-holzbau.lu und Paperjam Bible. Gegruendet 1991, RCS-Eintragung als SA vom 01.06.2005. Geschaeftsfuehrer laut RCS: Stephan Hostert, Mark Weber, Matthias Hettinger, Ferdinand Steffen. Mitarbeiterzahl laut Paperjam Bible 70 (Stand 2015), aktuelle Groessenklasse geschaetzt. Umsatz nicht oeffentlich verfuegbar, grobe Schaetzung anhand Mitarbeiterzahl und Branche.


branche_text: Herstellung von sonstigen Konstruktionsteilen aus Holz für das Bauwesen (Zimmerei, Ingenieur-Holzbau)

umsatz_kl: 10-20 Mio EUR (Schätzung)

belege: Firma Steffen Holzbau SA, Adresse 13 Rue de Flaxweiler, L-6776 Grevenmacher, übereinstimmend bestätigt durch Northdata (RCS B45638, NACE 16.23), editus.lu, Firmenwebsite steffen-holzbau.lu und Paperjam Bible. Gegründet 1991, RCS-Eintragung als SA vom 01.06.2005. Geschäftsführer laut RCS: Stephan Hostert, Mark Weber, Matthias Hettinger, Ferdinand Steffen. Mitarbeiterzahl laut Paperjam Bible 70 (Stand 2015), aktuelle Größenklasse geschätzt. Umsatz nicht öffentlich verfügbar, grobe Schätzung anhand Mitarbeiterzahl und Branche.