hn-tech-signal-mcp: Instructions file for Claude Code

CLAUDE.md

hn-tech-signal-mcp CLAUDE.md is an instructions file for Claude Code from malkreide/hn-tech-signal-mcp. It costs 12,419 tokens per session, scanned A, a copy of swisstopo-mcp CLAUDE.md, MIT.

A set of Claude Code instructions for working on the hn-tech-signal-mcp project, including repository checks, portfolio conventions, and test guidance.

In plain words
What is it for?
Use it when preparing changes, checking the correct default branch, running tests, and diagnosing failures in that project.
Why use it?
It helps prevent work on an outdated copy of the repository and explains how to respond when checks fail.

Instructions file for Claude Code

Written for Claude Code: SessionStart hook event. Also seen: reads .claude/ paths; mentions CLAUDE.md; mentions Codex.

This is malkreide/hn-tech-signal-mcp's own configuration. It tells Claude Code how to work on hn-tech-signal-mcp itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything hn-tech-signal-mcp configures →

Reuse

Borrowing it

Nothing to install: this file belongs to malkreide/hn-tech-signal-mcp. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/malkreide/hn-tech-signal-mcp/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/malkreide/hn-tech-signal-mcp

Made for: Claude Code.

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README.md
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Per session 12,419 This file is loaded in full into every session.
When invoked 12,419 The same file — it is already loaded in full.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin 66% copy Near-identical to another mod in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.12419 $0.12419
Opus 5.5 $0.04968 $0.04968
Sonnet 5.5 $0.02484 $0.02484
Haiku 4.5 $0.01242 $0.01242

Measured today against content hash 5702f6ec935b, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

hn-tech-signal-mcp CLAUDE.md scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured today.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

Token aus der Umgebung in einen curl-Header zu setzen, blockiert der
Origin

This is a copy

66% identical to swisstopo-mcp CLAUDE.md — 574 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

CLAUDE.md · 811 lines

How it starts

The opening of the file, as written. The whole thing — 811 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md

Teil 1 — Portfolio-Konventionen

Vor der Arbeit

Klon-Aktualität prüfen — Standard-Branch ermitteln, nicht main annehmen:

B=$(git ls-remote --symref origin HEAD | sed -n 's|^ref: refs/heads/\([^[:space:]]*\).*|\1|p')
git fetch origin "${B:?Standard-Branch nicht ermittelbar}" &&
  git rev-list --count HEAD..FETCH_HEAD

Drei Server im Portfolio heissen ihren Standard-Branch master (openlex-mcp, swiss-courts-mcp, swisstopo-mcp); dort scheitert ein fest verdrahtetes origin/main mit «couldn't find remote ref main». Wer das für ein Netzproblem hält, arbeitet weiter auf genau dem veralteten Klon, vor dem dieser Absatz warnt. Den :?-Schutz nicht weglassen: Bei leerem B fetcht git still den Remote-HEAD und endet mit 0.

Ein veralteter Klon erzeugt eine rote CI, deren Ursache nicht im Diff steht. Am 3.8.2026 zweimal passiert — beide Male fehlten genau die Commits, die das Gate einführten, an dem der Branch scheiterte.

In diesem Repo läuft die Prüfung seit PR #46 automatisch: der SessionStart-Hook .claude/hooks/session-start.sh meldet den Rückstand beim Sessionstart und schweigt bei 0. Er ersetzt den Befehl oben nicht, sondern erinnert daran — er blockiert nie und schweigt deshalb auch, wenn Netz, Remote oder Default-Branch nicht zu ermitteln sind. In den übrigen Servern des Portfolios gibt es ihn noch nicht; dort bleibt es Handarbeit. Begründung und Zusicherungen: .claude/hooks/README.md.

Gates lokal fahren, mit der GEPINNTEN ruff-Version aus der CI. Eine andere Version meldet Abweichungen, die niemand verursacht hat.

Tests

Gegenprobe ist Pflicht. Ein Test, der grün bleibt, wenn man die Implementierung entfernt, prüft nichts. Jede neue Zusicherung einzeln neutralisieren und zeigen, dass genau die zugehörigen Tests fallen.

Zwei Fallen, die beide grün blieben:

  • Eine Fake-Uhr, die nur beim Schlafen vorrückt, kann eine Zusicherung über echte Zeit nicht widerlegen.
  • monkeypatch.setattr(modul.asyncio, "sleep", ...) greift ins Modul asyncio selbst und entschärft die Mechanik im ganzen Prozess. Patche einen Modul-Alias (_sleep = asyncio.sleep), nicht das fremde Modul.

Read the full file on GitHub · 811 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. today Changed · +77 lines · +1,338 tokens per session 5702f6ec935b
  2. 29d ago Changed · +63 lines · +1,081 tokens per session 228131c5c3e5
  3. 1mo ago Changed · +83 lines · +1,443 tokens per session dfdf662009b5
  4. 1mo ago Changed · +49 lines · +669 tokens per session 15a8613fcf65
  5. 1mo ago Changed · -181 lines · -2,586 tokens per session 9bc83de0f2dd
  6. 1mo ago Changed · +37 lines · +566 tokens per session 7a733ebc4b46
  7. 1mo ago Changed · +54 lines · +917 tokens per session 5f351e7349f5
  8. 1mo ago Changed 5b35b91f2e33
  9. 2mo ago Changed c0460a2f2bf2
  10. 2mo ago First seen · 629 lines · 8,991 tokens per session scan A 7a6fd744024f

Subscribe to this mod's changes

hn-tech-signal-mcp CLAUDE.md is an instructions file published in the GitHub repository malkreide/hn-tech-signal-mcp (0 stars, last pushed today), licensed MIT. It adds 12,419 tokens to every session, about $0.0497 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). It is 66% identical to swisstopo-mcp CLAUDE.md, differing in 574 lines, and is treated as a copy.

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