PersonalKnowHow

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Turns a scattered personal learning/work history — LinkedIn, GitHub, course platforms, Gmail completion emails, sibling project repos — into a unified knowledge graph, queryable with semantic search instead of keyword matching. Run it locally against your own data in two commands, no account required — or query the real, deployed MCP servers described further down.

Asking Claude (via the deployed MCP server) to evaluate a job posting against the graph — real evidence pulled from LinkedIn/GitHub history, not a guess. (full-resolution video)

Try it locally in 60 seconds

No Cloudflare account, no signup, nothing deployed — just your own machine.

git clone https://github.com/Georgi-Petkov/personalknowhow.git
cd personalknowhow
python quickstart.py
python ingest/query_local.py "what do I know about X"

quickstart.py auto-detects whatever sources are already available on your machine and skips the rest with a clear reason — at minimum, an already-authenticated GitHub CLI (gh auth login) or your sibling project repos are enough to get real results. query_local.py embeds your graph with a small local model (BAAI/bge-small-en-v1.5 via sentence-transformers, downloaded once from Hugging Face on first run — the one real network dependency of local mode, distinct from needing a cloud account) and ranks results by cosine similarity, the same approach the deployed MCP servers use.

Want your own LinkedIn history in the graph, not just GitHub/local-project evidence? Request your export at linkedin.com → Settings & Privacy → Data privacy → Get a copy of your data, then:

python quickstart.py --linkedin ~/Downloads/LinkedInDataExport.zip
python ingest/query_local.py "what do I know about X"

quickstart.py handles unzipping and routing it to the right ingest script itself — no manual file placement, no flags to figure out. (Requesting the export happens entirely on LinkedIn's site and can take a few minutes for them to prepare — everything after that is the two commands above.)

Every other source (edX, DataCamp, Gmail) needs its own one-time setup (a hand-populated JSON file or OAuth credentials) — quickstart.py detects and skips each one gracefully with a one-line reason if it's not set up; see ingest/CLAUDE.md for per-source details if you want to add one.

Try the live demo

https://personalknowhow-demo.kxtwrdzt6g.workers.dev/mcp is a real, deployed MCP server — but it's not a webpage. Opening that URL in a browser sends a plain GET, and MCP servers only speak POST with JSON-RPC framing, so you'll just see a bare {"error":{"message":"Method not allowed."}}. That's expected, not broken — it means you're looking at it the wrong way.

The actual way to use it is as an MCP connector. In Claude Desktop, edit claude_desktop_config.json (config file location):

{
  "mcpServers": {
    "personalknowhow-demo": {
      "command": "npx",
      "args": ["mcp-remote", "https://personalknowhow-demo.kxtwrdzt6g.workers.dev/mcp"]
    }
  }
}

Restart Claude Desktop, then ask something like "use personalknowhow-demo to check if I have Django experience" — Claude calls the query_knowhow tool over MCP and gets back semantically-matched evidence (courses, projects, certifications) with similarity scores, no auth required.

If you just want to confirm the server is alive without setting up a client:

curl -s https://personalknowhow-demo.kxtwrdzt6g.workers.dev/mcp \
  -X POST -H "Content-Type: application/json" -H "Accept: application/json, text/event-stream" \
  -d '{"jsonrpc":"2.0","id":1,"method":"initialize","params":{"protocolVersion":"2024-11-05","capabilities":{},"clientInfo":{"name":"test","version":"1.0"}}}'

A 200 with a JSON-RPC response back confirms it's live — the Accept header above is required; without it the server correctly returns 406 Not Acceptable, which is a different, also-expected error from the browser-GET one above.

Why this exists

Course-completion lists and keyword-matched resumes are a weak signal of what someone actually knows. This project builds a real knowledge graph from primary sources (not self-reported summaries), embeds every entry with a real embedding model, and exposes it as a queryable MCP tool — so "do I have Django experience?" gets answered by walking real evidence (a project's README, a course completion, an endorsement) with a similarity score attached, not a guess.

Architecture

ingest/            Source-specific scripts → common schema
                    {title, type, provider, date, description, domain_tags}
corpus/             Generated markdown, one subfolder per source (not tracked — see Privacy below)
graph.json          Extracted nodes/edges from corpus/ (not tracked)
mcp/                Public MCP server (Cloudflare Worker) — semantic search, no auth
mcp-private/        Private MCP server — same search, bearer-token gated, adds
                    signal-only evidence (job applications, career interests)

Ingestion sources: LinkedIn (via the Member Data Portability API, EU-only — see docs/linkedin-connector-notes.md for notes on the manual-export alternative for other regions), GitHub (via the gh CLI, excluding forks — a fork is evidence of browsing, not building), DataCamp/edX/Skilljar course completions, Gmail (completion emails from other platforms), and sibling project repos (auto-discovered, evidenced via README + tracked filenames + a keyword pass, not self-reported).

ingest/merge.py deduplicates across sources (idempotent — safe to re-run). ingest/build_graph.py extracts nodes/edges from corpus/ frontmatter into graph.json.

The RAG layer

Both mcp/ and mcp-private/ are stateless Cloudflare Workers (createMcpHandler, no Durable Object) that embed every corpus entry with Workers AI (@cf/baai/bge-base-en-v1.5, 768-dim) at export time, and embed the query string at request time, then rank by cosine similarity. Two MCP tools are exposed: query_knowhow(topic) for semantic search, and list_by_type(type) for a plain listing. The private server additionally tags every result with an evidence_tier (demonstrated vs. signal_only), so a job application or career-interest entry can never be mistaken for proof of a skill.

Privacy design

corpus/ and graph.json are never public — no public-facing code reads them directly. The only sanctioned public data source is mcp/public_entries.json, built by ingest/build_public_export.py via a fail-closed allowlist: only explicitly listed corpus categories (courses, projects, certifications, education, endorsements, positions, profile, recommendations, articles) get exported. A new corpus category is excluded by default until someone deliberately adds it to the allowlist — the same discipline that keeps job applications and career-interest data out of the public server entirely; that data only exists in mcp-private/, gated behind a bearer token, and is never committed to this repo either (see .gitignore).

Career-agent tooling

A second layer built on top of the same corpus: ingest/analyze_job_postings.py scores scraped job postings against known skill coverage using the same embeddings (graded known/peripheral similarity, not binary keyword matching), ingest/cv_tailor.py matches a posting's requirements against CV bullets with an explicit two-tier system (exact-term matches vs. semantically-related matches, the latter always labeled "verify before claiming" rather than asserted), and ingest/recommend_courses.py cross-references course catalogs against coverage gaps.

Running individual ingest sources manually

python quickstart.py (see the top of this README) runs everything below automatically for whichever sources it detects. For finer control — a single source, non-default flags, or re-running just one step after a corpus change — run any of these directly:

pip install -r requirements.txt

# Run a specific ingest source, e.g.:
python ingest/github_ingest.py
python ingest/linkedin_api_ingest.py --domains PROFILE,POSITIONS,SKILLS

# Deduplicate corpus after any ingest run
python ingest/merge.py

# Build graph.json from corpus/
python ingest/build_graph.py

Each ingest/*_ingest.py script is independent — run whichever sources apply to you. All of them write markdown into corpus/<source>/ using the shared schema below.

Corpus schema

Every markdown file in corpus/ uses this YAML frontmatter:

---
title: "Advanced Python Programming"
type: "course"              # course | certification | position | project | education | ...
provider: "LinkedIn Learning"
date: "2024-01-15"
description: "Free-text summary."
domain_tags:
  - python
  - programming
---

Deploy your own hosted MCP server (optional, needs a Cloudflare account)

Local mode (above) is enough to query your own graph — this section is only for hosting it as a real MCP server other clients/people can connect to, the same way the live demo works.

cd mcp && npm install && npm run deploy        # public server
cd mcp-private && npm install && npm run deploy # private server
cd mcp-private && npm run secret                # set PRIVATE_MCP_TOKEN