Configuration reference

HappyView takes its configuration from three places. When one value is set in more than one, the first in this list wins:

1. Instance settings, saved in the dashboard (mostly under System > General) or through PUT /admin/settings/{key}. Only the keys listed below work this way.
2. The process environment. A variable set to an empty value still counts as set.
3. happyview.toml, for the few variables a project file can supply, marked in the tables.

Anything none of them sets takes its default. Running happyview with no arguments (serving) also loads a .env file into the environment; happyview dev, test, check and types don’t.

Server

Variable	Default	What it does
PUBLIC_URL	required	The URL the instance is reached at. Boot fails without it.
HOST	0.0.0.0	Address to listen on.
PORT	3000	Port to listen on. An unreadable value means 3000. happyview.toml: [dev] port, under dev only.
BASE_PATH	none	Serve under a path prefix, such as /happyview. A trailing / is trimmed; / alone means none. A value that doesn’t start with / stops boot.
STATIC_DIR	the built-in dashboard	Serve the dashboard from this directory instead.
HAPPYVIEW_PROJECT	none	A project directory to build and serve at boot. A directory that doesn’t exist stops boot.
HAPPYVIEW_USER_AGENT	HappyView/<version> (+<PUBLIC_URL>)	The User-Agent on outbound requests.
APP_NAME	none	Your app’s name, shown on OAuth consent screens and linked-repo pages. happyview.toml: [instance] app_name. Instance setting app_name.
LOGO_URI, TOS_URI, POLICY_URI	none	Links published in OAuth client metadata. Instance settings logo_uri, tos_uri, policy_uri; an uploaded logo wins over logo_uri.
CLIENT_URI	none	client_uri in OAuth client metadata. Instance setting client_uri.
RUST_LOG	see below	The log filter.

RUST_LOG’s default depends on the command: happyview=debug,tower_http=debug,sqlx=warn when serving, happyview=info,tower_http=warn,sqlx=warn under dev, warn for check and types, error for test.

Database

Variable	Default	What it does
DATABASE_URL	required	sqlite://… or postgres://…. Boot fails without it.
DATABASE_BACKEND	from the URL	sqlite or postgres.
DATABASE_MAX_CONNECTIONS	16 (SQLite), 32 (Postgres)	The main connection pool’s size.
BACKFILL_DATABASE_MAX_CONNECTIONS	sized from the backfill concurrency, at most 16 (SQLite) or 256 (Postgres)	The backfill pool’s size. At least 1.
SQLITE_JOURNAL_SIZE_LIMIT	67108864 (64 MiB)	Largest size the WAL is trimmed to after a checkpoint. -1 means no limit.
SQLITE_SYNCHRONOUS	NORMAL	NORMAL or FULL.
SQLITE_CHECKPOINT_INTERVAL_SECS	60	Seconds between WAL checkpoints. 0 turns them off.
SQLITE_WAL_CHECKPOINT_BYTES	64 MiB	WAL size that triggers a checkpoint early. 0 turns it off.
SQLITE_TMPDIR, then TMPDIR	the system’s	Where a scheduled VACUUM’s free-space check looks, as SQLite does.
RECORD_COMPRESSION	zstd	zstd or none. Compresses record bodies on SQLite.
ZSTD_DICT_TRAIN_AT	5000	Records a collection needs before a compression dictionary is trained for it.
RECORD_COMPRESSION_INTERVAL_SECS	600	Seconds between compression passes.

Secrets and sign-in

Variable	Default	What it does
SESSION_SECRET	none	Signs the dashboard’s session cookie. Must be at least 32 bytes; generate one with openssl rand -base64 48. When it’s unset, too short, or the placeholder change-me-in-production, the instance still starts, but nobody can sign in to the dashboard, and the dashboard shows why.
TOKEN_ENCRYPTION_KEY	none	Base64 of exactly 32 bytes (openssl rand -base64 32). Encrypts stored OAuth tokens and keys. Without a valid one, app sign-in, spaces and service identity don’t work; an invalid value is logged and ignored.
SUPERADMIN_DID	none	A DID given the superadmin privilege at every boot. A value that isn’t a DID stops boot; empty means unset. Once set, the first person to sign in is no longer given superadmin. happyview.toml: [instance] superadmin.
PLATFORM_API_KEY_HASH	none	The SHA-256, as 64 hex characters, of the key a hosting platform uses for /admin/platform. See Platform.
DEFAULT_RATE_LIMIT_CAPACITY	100	Request budget for a new API client.
DEFAULT_RATE_LIMIT_REFILL_RATE	2.0	Requests per second a new API client’s budget refills by.
ATTESTATION_PRIVATE_KEY	stored, else generated	A hex secp256k1 key for attestation signing.
ATTESTATION_KEY_ID	did:web:<PUBLIC_URL host>#attestation; did:web:localhost#attestation when ATTESTATION_PRIVATE_KEY is set	The key’s id in signatures.
ATTESTATION_SIG_TYPE	games.gamesgamesgamesgames.attestation	The signature’s $type.

Network

Variable	Default	What it does
JETSTREAM_URL	wss://jetstream1.us-east.bsky.network	The Jetstream to follow.
JETSTREAM_PROTOCOL	auto	auto, v2 or v1. happyview.toml: [jetstream] protocol.
JETSTREAM_COMPRESSION	true	true or false (also 1/0, yes/no, on/off). happyview.toml: [jetstream] compression.
JETSTREAM_WORKERS	8	Records processed in parallel, 1 to 64.
RELAY_URL	https://bsky.network	The relay backfill asks which accounts hold a collection.
PLC_URL	https://plc.directory	The PLC directory DIDs are resolved through.

Backfill

Variable	Default	What it does
BACKFILL_CONCURRENT_PDS	10	PDSes fetched from at once. Instance setting backfill_concurrent_pds.
BACKFILL_CONCURRENT_DIDS_PER_PDS	3	Accounts fetched at once from one PDS. Instance setting backfill_concurrent_dids_per_pds.
BACKFILL_CONCURRENT_RESOLUTION	100	DIDs resolved at once. Instance setting backfill_concurrent_resolution.
BACKFILL_RETENTION_DAYS	28	Days a finished backfill’s per-account detail is kept. 0 keeps it. Instance setting backfill_retention_days.
BACKFILL_DISCOVERY_WINDOW	50000	Units of work discovered ahead of fetching. A unit is one account under one collection.
BACKFILL_HOOK_CONCURRENCY	4	Record scripts run at once for one batch of a backfill, 1 to 32. A value outside the range is moved inside it.
BACKFILL_SOURCE	crawl	crawl fetches from each PDS, replay reads a Jetstream archive, and auto replays when the Jetstream has an archive and otherwise crawls.
BACKFILL_REPLAY_CONCURRENCY	8	Archive segments read at once, 1 to 64.
BACKFILL_REPLAY_DIR	<temp>/happyview-replay	Where archive segments are kept while replaying.
BACKFILL_REPLAY_MARKER_TAIL_HOURS	12	How far back from the archive’s newest data a network replay reads account and sync markers. 0 reads the job’s whole range.
JETSTREAM_API_KEY	none	Key for the Jetstream archive replay reads.

The three concurrency settings take effect on the next backfill; the backfill connection pool is sized from the environment at boot.

Plugins

Variable	Default	What it does
PLUGIN_DIR	./plugins	Where installed plugins are kept. Under dev, <project>/.happyview/plugins.
PLUGIN_CACHE_DIR	plugin-cache beside a SQLite database; none on Postgres	Where compiled plugins are cached on disk, so a restart doesn’t recompile them. It must belong to the user HappyView runs as and be private to it, or the cache stays in memory.
PLUGIN_REGISTRY_URL	https://api.happyproto.at	The plugin registry. Empty or off stops HappyView reading a registry.
HAPPYVIEW_DEFAULT_PLUGINS	none	Plugins to install on the first boot whose value lists them, separated by commas.
PLUGIN_URLS	none	Plugins to load from URLs at boot, as id|url|sha256:<hash>, separated by commas.
PLUGIN_<ID>_<NAME>	none	A plugin’s secret, used when the instance holds none for that plugin. <ID> is the plugin’s id upper-cased, with every other character as _.

Scripts and jobs

Variable	Default	What it does
SCRIPT_INSTRUCTION_LIMIT	1000000	Instructions a query, procedure, record or label script may run, from 1000 to 1000000000. Instance setting script_instruction_limit.
SCRIPT_WALL_CLOCK_SECONDS	10	Seconds a query, procedure, record or label script may run, from 1 to 300. Instance setting script_wall_clock_seconds.
HAPPYVIEW_SCRIPT_ENV_FILE	none	A .env-style file whose values are added to scripts’ ctx.env, re-read on every run. dev sets it to <project>/.env, test to <project>/.env.test.
JOB_WORKER_CONCURRENCY	1	Background jobs run at once, up to 32.
HOSTNAME	happyview	Names this instance’s job worker in each job’s claimed_by.
HAPPYVIEW_INSTANCE_ID	HOSTNAME, then the system’s hostname, then a random id	Names this process in stored script metrics, trimmed and cut to 128 characters. Give each instance sharing a database its own.
SCRIPT_METRICS_ENABLED	true	true or false. Whether scripts’ timings are recorded for the Script performance page. Instance setting script_metrics_enabled.
FEATURE_SPACES_ENABLED	false	true turns on spaces. Instance setting feature.spaces_enabled.

An out-of-range script limit in the environment is logged and the default is used; one saved as an instance setting is refused when saved. See Limits.

Logging, retention and telemetry

Variable	Default	What it does
EVENT_LOG_RETENTION_DAYS	30	Days event log entries, job logs and stored script metrics are kept. 0 keeps them. Instance setting event_log_retention_days.
DEAD_LETTER_RETENTION_DAYS	30	Days a resolved dead letter is kept. 0 keeps them. An unresolved one is never removed.
RECORD_TOMBSTONE_RETENTION_HOURS	72	Hours a deleted record’s tombstone is kept. 0 keeps them.
VERBOSE_EVENT_LOGGING	false	true logs every record script run and skip. It writes a lot. Instance setting verbose_event_logging.
TELEMETRY_COLLECTOR_URL	https://telemetry.happyview.dev/v1/snapshot	Where telemetry reports go, when it’s turned on.
TELEMETRY_MANAGED_BY	none	Set only by a hosting platform: it turns telemetry on and locks its settings. Lowercase letters, digits and -, at most 64 characters; anything else stops boot.

Development only

Variable	Default	What it does
HAPPYVIEW_DEV_BACKFILL	false	Whether dev backfills. Exactly true or false. happyview.toml: [dev] backfill.
HAPPYVIEW_WATCH_POLL_MS	file events	Poll for changes every this many milliseconds, 50 to 60000, instead of using file events. For dev and test --watch.
HAPPYVIEW_NETWORK	none	Which network dev is on. hpy happyview dev --network local sets it to local; any other value prints a warning that writes reach your real PDS.

happyview dev lists the defaults dev fills in.

Instance settings

These keys can be saved as instance settings, and then win over the environment. System > General in the dashboard edits most of them; PUT /admin/settings/{key} sets any of them, and DELETE returns a key to its environment value. Both need settings:manage.

Setting	Environment variable
app_name	APP_NAME
logo_uri, tos_uri, policy_uri, client_uri	LOGO_URI, TOS_URI, POLICY_URI, CLIENT_URI
backfill_concurrent_pds, backfill_concurrent_dids_per_pds, backfill_concurrent_resolution	BACKFILL_CONCURRENT_*
backfill_retention_days	BACKFILL_RETENTION_DAYS
event_log_retention_days	EVENT_LOG_RETENTION_DAYS
script_instruction_limit, script_wall_clock_seconds	SCRIPT_INSTRUCTION_LIMIT, SCRIPT_WALL_CLOCK_SECONDS
script_metrics_enabled	SCRIPT_METRICS_ENABLED
verbose_event_logging	VERBOSE_EVENT_LOGGING
feature.spaces_enabled	FEATURE_SPACES_ENABLED

GET /admin/settings lists every setting with where its value came from: database, env or project. The logo, the XRPC proxy, rate-limit costs and telemetry are also stored as settings, through their own endpoints and dashboard pages.

happyview.toml

A project’s happyview.toml. Every table is optional, and an unknown key anywhere is an error reported with its line. Project structure explains how they’re used.

Key	Type	Default	What it does
[happyview] version	string	none	The HappyView version hpy runs. A different running version only warns.
[instance] app_name	string	none	Supplies APP_NAME.
[instance] superadmin	DID	none	Supplies SUPERADMIN_DID.
[interpreters]."<language>"	{ did, name, channel | version }	none	An interpreter, by language id. channel is latest, beta or alpha; version pins an exact one. Exactly one of them.
[libraries]."<namespace>"	{ did, name, channel | version }	none	A library, by namespace, as for interpreters.
[dev] port	integer, 1 to 65535	none	Supplies PORT under dev.
[dev] backfill	boolean	false	Supplies HAPPYVIEW_DEV_BACKFILL under dev.
[network_lexicons] include	list of NSIDs	empty	Network lexicons to track.
[labels] subscribe	list of DIDs	empty	Labelers to subscribe to.
[jetstream] protocol	auto, v2 or v1	none	Supplies JETSTREAM_PROTOCOL.
[jetstream] compression	boolean	none	Supplies JETSTREAM_COMPRESSION.
[lexicons."<NSID>"] backfill	boolean	false	Backfill this record lexicon’s collection once.
[lexicons."<NSID>"] target_collection	NSID	none	The collection a query or procedure works on.
[lexicons."<NSID>"] action	create, update, delete or upsert	upsert	What a procedure without a script does.
[lexicons."<NSID>"] indexed	boolean	true	false stops indexing the collection, keeping what’s indexed.
[lexicons."<NSID>"] token_cost	integer	the cost set for the lexicon’s type	How much of an API client’s rate-limit budget one call to this endpoint uses.
[scripts."<trigger>"] description	string	none	Shown with the script in the dashboard.
[scripts."<trigger>"] outbound_xrpcs	list of strings	empty	The XRPC methods the script calls, recorded with it and listed by the admin API. A service auth call to a procedure script is refused when the list names any method other than the one called.
[modules."<name>"] language	string	required	rust.
[modules."<name>"] path	path	required	The module’s crate, relative to the project and inside it.
[modules."<name>"] capabilities	list of capabilities	empty	What the module is granted.

A deploy ignores [happyview], [instance], [interpreters], [libraries], [dev] and [jetstream]; see Deploying.