ktx

Install and configure ktx, the open-source context layer for data agents. Use this skill when a user wants an agent to add ktx to a project, connect data sources, build initial context, install agent integration, or troubleshoot a local ktx setup.

Operating rules

• Act autonomously when the user asks you to install or configure ktx. The non-interactive scripted flow below is the canonical path — bare ktx setup is interactive (clack prompts) and an agent cannot drive it.
• Setup's non-interactive flags are intentionally hidden from --help. Use the flags listed below; verify uncommon flags against the docs at https://docs.kaelio.com/ktx/ or this skill — not against --help output.
• Ask only for values you cannot infer: project directory, connection targets, credentials, account identifiers, and source selections.
• Never ask the user to paste secrets when an env:VAR_NAME or file:/path reference would work. Pasting a literal URL is also safe — ktx setup auto-externalizes URLs into .ktx/secrets/<id>-url (see workflow step 2).
• Do not commit .ktx/secrets/*.
• Print each command you run and its result.
• If a command fails, identify the cause and change something before retrying.

Gather inputs once

Before invoking ktx setup, collect in one round:

1. Project directory (default: current working directory).
2. LLM backend and key strategy. In --no-input mode the CLI defaults to anthropic and requires an API key. When the user is inside Claude Code, pass --llm-backend claude-code explicitly; otherwise pass --llm-backend anthropic --anthropic-api-key-env ANTHROPIC_API_KEY.
3. Embedding backend (sentence-transformers is the local default and needs no key; use openai only if the user already has a key, then pass --embedding-api-key-env OPENAI_API_KEY).
4. Database: driver, connection id, URL (or env: / file: ref), and one or more schemas.
5. Optional context sources (dbt, Metabase, Looker, LookML, MetricFlow, Notion). Add each one with a follow-up ktx setup --source … run (see Add context sources); use --skip-sources only when the user has none.

Do not discover these inputs across multiple setup runs.

Install workflow

1. Detect the install path. If the working directory contains packages/cli/dist/bin.js or pnpm-workspace.yaml referencing @kaelio/ktx you are inside the ktx monorepo — build and link the local CLI with pnpm and do not run npm install -g. Otherwise:

   node --version    # require >= 22; stop and ask the user if older
   ktx --version || npm install -g @kaelio/ktx
   

2. Run scripted setup (canonical path):

   ktx setup --no-input --yes \
     --project-dir <path> \
     --llm-backend claude-code \
     --embedding-backend sentence-transformers \
     --database <driver> --database-connection-id <id> \
     --database-url '<raw-url | env:NAME | file:/abs/path>' \
     --database-schema <schema> \
     --skip-sources
   

   • Configure one new database connection per setup invocation. For multiple connections, rerun setup once per connection.
   • Pasting a literal --database-url is safe: the CLI relocates the URL into .ktx/secrets/<connection-id>-url and rewrites ktx.yaml to a file: ref automatically.

3. Resumability and --skip-*. Re-running ktx setup against an existing project resumes its config. Use --skip-llm, --skip-databases, --skip-sources, or --skip-embeddings to leave a slice unconfigured but let the rest complete instead of aborting on the first failure. When resuming an existing project to change one slice (e.g. only LLM), still pass the database flags from the previous run — setup validates current flags, not persisted ktx.yaml state.

4. Build context if setup did not already complete one:

   ktx ingest <connection-id> --no-input
   

   ktx ingest always builds enriched context and requires a configured model and embeddings (set during setup); a database connection without them fails with an enrichment-readiness error. Note: ktx ingest rejects --yes together with --no-input (Choose only one runtime install mode); ktx setup accepts both. Use --no-input only for ingest.

5. Install agent integration:

   ktx setup --agents --target <claude-code|claude-desktop|codex|cursor|opencode|universal>
   ktx mcp start --project-dir <path>
   

   Agent integration is not usable until ktx mcp start is running. The --agents step prints this requirement as Required before using agents.

6. Fall back to bare ktx setup only when a human is at the keyboard — it uses interactive prompts an agent cannot answer.

Add context sources

Context sources (dbt, Metabase, Looker, LookML, MetricFlow, Notion) are added one at a time — --source is not repeatable, so run ktx setup once per source. Source setup is resumable against an existing project: pass --skip-databases --skip-llm --skip-embeddings so only the source is configured. Map warehouse-backed sources (dbt, Metabase, Looker) to an existing database connection with --source-warehouse-connection-id <db-connection-id>. Prefer env:VAR / file:/abs/path refs for keys and tokens over literals.

# dbt — pick exactly one of --source-path (local) or --source-git-url (remote)
ktx setup --no-input --yes --skip-databases --skip-llm --skip-embeddings \
  --source dbt --source-connection-id <id> \
  --source-git-url <url> --source-branch <branch> \
  --source-warehouse-connection-id <db-connection-id>

# Metabase
ktx setup --no-input --yes --skip-databases --skip-llm --skip-embeddings \
  --source metabase --source-connection-id <id> \
  --source-url <url> --source-api-key-ref env:METABASE_API_KEY \
  --source-warehouse-connection-id <db-connection-id> \
  --metabase-database-id <metabase-db-id>

# Notion
ktx setup --no-input --yes --skip-databases --skip-llm --skip-embeddings \
  --source notion --source-connection-id <id> \
  --source-auth-token-ref env:NOTION_TOKEN \
  --notion-crawl-mode selected_roots --notion-root-page-id <page-id>

Notes:

• --metabase-database-id is the numeric id of the warehouse inside Metabase (not the ktx connection id). Discover it from the Metabase API (GET /api/database) or UI if the user doesn't know it.
• --notion-crawl-mode selected_roots requires at least one --notion-root-page-id (repeatable); use all_accessible to crawl everything the token can see.
• After adding sources, ingest each new connection so its context is queryable: ktx ingest <source-connection-id> --no-input.

Files to inspect

• ktx.yaml: project configuration.
• .ktx/secrets/*: local secret files. Never commit them.
• semantic-layer/<connection-id>/*.yaml: semantic sources for SQL compilation.
• wiki/**/*.md: project context pages for agents.
• .claude/skills/ktx/, .agents/skills/ktx/, .cursor/rules/ktx.mdc, and .opencode/commands/ktx.md: generated agent integration files.

Verification

After setup, run:

ktx connection test <connection-id>
ktx status --json --no-input

Judge readiness from ktx status --json fields, not the exit code. ktx status exits 1 whenever the LLM is none, even when embeddings and every database connection are healthy. Treat success as:

• verdict: "ready" at the top of the JSON, and
• every connections[].status === "ok", and
• every ktx connection test <id> exited 0.

A non-zero exit with only the LLM unconfigured is still a usable context layer — report it as "ready, LLM optional" rather than retrying setup.

Troubleshooting

For known failure signatures (invalid ELF header, Native CLI binary for <plat> not found, Missing Anthropic API key, claude-code probe failure, KTX cannot work without a database on resu