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krow_backend/.env.example
Suriyakumarvijayanayagam bd9a8f91fc
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Make the shipped example envs ones that can actually start
The krow-2 deploy failed on the ANTHROPIC_API_KEY guard, which is the guard
doing its job. Checking what an operator hits *after* fixing it turned up two
older faults in the files they are told to copy — both predating the Groq
switch, both fatal at boot.

HTTP_WRITE_TIMEOUT shipped as 30s in .env.example, .env.docker.example and the
compose default, while validateWriteTimeout refuses anything at or under the
deep tier's 2m deadline. `cp .env.docker.example .env && docker compose up`
could not start. Now 180s. krow-2 never saw this because someone had already
overridden it in that environment.

.env.docker.example carried no model block at all, so a production stack built
from it is refused for a missing MODEL_API_KEY. Added, with the Groq defaults
and the reasoning-effort note (most non-reasoning models reject the request
rather than ignoring the key).

Neither was subtle. Both survived because the examples were prose to every test
in this package: the validator and the file documenting it had no mechanical
connection, so tightening one silently invalidated the other. That connection
is now TestShippedExampleEnvActuallyBoots, which parses each example and runs
Load() on it under the APP_ENV the file itself declares — production for the
docker one, development for the root one, each internally consistent. Verified
by mutation: reverting the timeout, removing the key line, and restoring a
claude-* id each fail it with the message an operator would see.

Go does not treat these files as test inputs, so an example-only edit can be
served a stale pass from the test cache. Noted in the test; use -count=1.

Also documented the upgrade path in handover.md, including the one thing
startup validation cannot catch: renaming ANTHROPIC_API_KEY to MODEL_API_KEY
without replacing the value boots fine and 401s on every run.

gofmt clean, go vet clean, 15/15 packages pass.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PJvibeSc1JYXjatankqM1g
2026-09-07 12:25:20 +05:30

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# ============================================================================
# Krow backend — example environment
#
# Copy to .env and fill in. .env is gitignored and must never be committed.
# Every value below is a placeholder or a safe local default: no real password,
# API key or token belongs in this file.
#
# cp .env.example .env
# ============================================================================
# ── Application ─────────────────────────────────────────────────────────────
APP_ENV=development # development | staging | production
LOG_LEVEL=info # debug | info | warn | error
# ── HTTP server ─────────────────────────────────────────────────────────────
HTTP_HOST=127.0.0.1
HTTP_PORT=8080
HTTP_READ_TIMEOUT=15s
# 180s, not 30s. internal/config REFUSES TO START when this is below the deep
# tier's 2m agent deadline: the server would abort the response mid-run and the
# caller would see 502 from the proxy in front, a gateway error for something no
# gateway did. 30s shipped here for a long time and was the cause of exactly
# that incident. Anything at or under 2m0s is a container that will not boot.
HTTP_WRITE_TIMEOUT=180s
HTTP_IDLE_TIMEOUT=60s
HTTP_SHUTDOWN_TIMEOUT=10s
# Browser origins allowed to call this API cross-origin, comma-separated.
# Unset in development it defaults to the Vite dev server on both hostnames
# (localhost and 127.0.0.1 are different origins to a browser) plus `vite
# preview`. Unset anywhere else it defaults to empty, meaning same-origin only.
# Origins are matched exactly, echoed back one at a time, and "*" is rejected.
# HTTP_CORS_ORIGINS=http://localhost:5173,http://127.0.0.1:5173
# ── PostgreSQL ──────────────────────────────────────────────────────────────
# The local development database. DATABASE_NAME is mixed-case and hyphenated,
# so anything that interpolates it into SQL must quote it: "Krow-force".
DATABASE_HOST=127.0.0.1
DATABASE_PORT=5432
DATABASE_NAME=Krow-force
DATABASE_USER=postgres
DATABASE_PASSWORD=
DATABASE_SCHEMA=public
# sslmode: disable is fine for a loopback dev database. APP_ENV=production
# rejects `disable` at startup — use require or verify-full there.
DATABASE_SSLMODE=disable
# Pool and timeout tuning.
DATABASE_MAX_OPEN_CONNS=25
DATABASE_MIN_IDLE_CONNS=2
DATABASE_CONN_MAX_LIFETIME=30m
DATABASE_CONNECT_TIMEOUT=5s
DATABASE_STATEMENT_TIMEOUT=10s
# ── Migrations ──────────────────────────────────────────────────────────────
# Consumed by the Makefile, which builds the golang-migrate URL from the
# DATABASE_* values above. Keep it pointed at the repository's migrations/.
MIGRATIONS_DIR=./migrations
# ── Seed ────────────────────────────────────────────────────────────────────
# The demo fixture, generated from the frontend repository's src/api/seed.js.
# The Makefile passes an absolute path; this default suits running from the
# repository root.
SEED_FIXTURE_PATH=./seed/fixtures/seed.json
# ── Model gateway ───────────────────────────────────────────────────────────
# The one place this service talks to a language model. An agent spec declares
# a `reasoning` tier — fast | balanced | deep — never a model id, so the
# mapping below is a deployment decision and changes without editing a single
# definition.
#
# WHICH PROVIDER ANSWERS is a deployment decision, but the wire protocol is no
# longer one. There is a single implementation:
#
# openai the chat-completions shape — which is NOT only OpenAI. Groq,
# Gemini (through its OpenAI-compatible endpoint), OpenRouter,
# Together, vLLM and a local Ollama all serve it, so moving
# between them is MODEL_BASE_URL and MODEL_* ids, nothing more.
#
# The anthropic path was REMOVED. MODEL_PROVIDER=anthropic is refused at
# startup rather than ignored, because a stack still carrying it would
# otherwise run on a vendor it never chose. Leave this empty or set "openai".
MODEL_PROVIDER=openai
# Where the provider is. Defaults to Groq when unset — the model ids below are
# Groq ids, and an id is only meaningful against the service that serves it, so
# these two settings move together or not at all.
#
# Groq https://api.groq.com/openai/v1 (the default)
# Gemini https://generativelanguage.googleapis.com/v1beta/openai
# OpenRouter https://openrouter.ai/api/v1
# Ollama http://localhost:11434/v1 (no key needed)
MODEL_BASE_URL=https://api.groq.com/openai/v1
# The credential. ANTHROPIC_API_KEY is NO LONGER READ — if it is set while this
# is empty, startup fails rather than silently ignoring it.
# May be empty outside production: migrations, seeding and every endpoint that
# is not an agent run work without one, and an agent run fails with a
# structured `gateway.not_configured` rather than the service refusing to boot.
# APP_ENV=production requires one — unless the model is on localhost, which
# needs no credential at all.
MODEL_API_KEY=
# The tiers differ by model AND by *effort*, which the gateway fixes
# (fast=low, balanced=high, deep=xhigh) so that "deep" cannot mean two
# different things in two deployments.
#
# These must be ids your MODEL_BASE_URL actually serves. A leftover claude-*
# id is refused at startup: it would be accepted by this process, rejected by
# the provider, and fail every single run with a 400.
MODEL_FAST=llama-3.1-8b-instant
MODEL_BALANCED=llama-3.3-70b-versatile
MODEL_DEEP=llama-3.3-70b-versatile
MODEL_MAX_OUTPUT_TOKENS=16000
# Send the tier's effort level as `reasoning_effort` on the openai-compatible
# wire. OFF by default and it should stay off unless every model named above is
# a reasoning model: the others reject the entire request rather than ignoring
# an unknown key, so turning this on for a non-reasoning model breaks every run
# with a 400. Ignored by the anthropic provider, which always sends effort.
MODEL_REASONING_EFFORT=false
# ── Knowledge layer (retrieval) ─────────────────────────────────────────────
#
# The dense half of hybrid retrieval needs an embedding model. Three options,
# and the choice is worth making deliberately: all three return vectors and
# retrieval works with any of them, so a deployment running the wrong one looks
# exactly like one running the right one — until somebody phrases a question
# differently.
#
# ollama A model on this machine. Real semantics, no credential, no
# per-token cost, and no tenant text leaving the host. Start here.
#
# brew install ollama
# ollama pull nomic-embed-text
#
# then EMBED_PROVIDER=ollama.
#
# voyage Hosted, and better on subtle retrieval over a large messy corpus.
# Needs VOYAGE_API_KEY. Anthropic does not serve embeddings, so
# this is a separate credential.
#
# lexical A deterministic stand-in that hashes words into a vector. NOT
# semantic — "annual leave" and "time off" are unrelated to it. It
# exists so the permission filter and the citation path can be
# tested without a network. Startup REFUSES it when
# APP_ENV=production.
#
# Leave EMBED_PROVIDER empty and the choice is inferred from what is set,
# preferring the local model. With nothing configured at all, retrieval runs
# keyword-only and says so on every result.
#
# CHANGING PROVIDER MEANS RE-EMBEDDING. Vectors from two models are not
# comparable, and every chunk records which model produced it — so after a
# switch the old vectors are simply not searched, and retrieval silently drops
# to keyword-only until you run:
#
# make reembed ORG=<slug>
#
EMBED_PROVIDER=ollama
EMBED_BASE_URL=http://localhost:11434
EMBED_MODEL=nomic-embed-text
EMBED_DIMENSIONS=768
# Only for EMBED_PROVIDER=voyage.
VOYAGE_API_KEY=
# Legacy switch for the stand-in. EMBED_PROVIDER=lexical is the current spelling.
EMBED_USE_LEXICAL=false