charly-config

Recipe card from the charly-core plugin (Commands — runtime CLI verbs).

charly config – Image Deployment Configuration

Overview

charly config configures an image for deployment. In run_mode=quadlet (the default on systemd-user hosts) it generates a systemd quadlet unit, provisions container secrets, initializes encrypted volumes, and seeds data from data candies into the image’s volumes. In run_mode=direct (auto-selected on nested environments without systemd-user — check-sandbox pods, supervisord-only containers, sysvinit hosts) it skips quadlet+systemctl and runs the container via podman run -d, recording a marker file at ~/.config/charly/direct/<name>.json so charly start/charly remove can find it. Direct mode does NOT support sidecars, encrypted volumes, or cloudflare tunnel companion services (those require systemd) — warnings are emitted and the operation proceeds without those features.

This is the single entry point for container deployment setup. charly start requires charly config to have been run first in quadlet mode.

Relationship to charly bundle add — charly config remains the primary way to create/update a quadlet and provision secrets/volumes/sidecars for a container deploy. charly bundle add <name> <ref> (container target) wraps both charly config and charly start and additionally handles --add-candy overlay synthesis (an overlay Containerfile is built before the quadlet references the resulting overlay image). charly bundle add host bypasses charly config entirely — the host target has no quadlet; it writes systemd units directly (when --with-services is enabled) and records every action in the ledger at ~/.config/opencharly/installed/. See /charly-core:deploy for the command family and /charly-local:local-deploy for host-target semantics.

charly config vs charly settings — common verb confusion. charly config <image> configures an image for deployment (quadlet + secrets + volumes + data seed). charly settings list shows runtime config keys (secret_backend, vm.backend, etc.). A trailing charly config show parses as charly config setup show with show as the image positional — and errors with image "show" is not available locally. To inspect runtime configuration use charly settings list; to inspect a configured image’s resolved deploy state use charly box inspect <image> or charly bundle show <name>.

Quick Reference

Action	Command	Description
Full setup	charly config <image>	Quadlet + secrets + volumes + data seed
Instance setup	charly config <image> -i <instance>	Deploy named instance with separate config
With bind mount	charly config <image> --bind workspace=~/project	Bind workspace to host dir
With encryption	charly config <image> --encrypt data	Encrypted volume via gocryptfs
Volume config	charly config <image> -v data:bind:/mnt/nas	Explicit volume backing
Manual passwords	charly config <image> --password manual	Prompt for each secret
Re-seed data	charly config <image> --force-seed	Overwrite existing data
Seed from other image	charly config <image> --data-from data-image:v1	Use separate data image
No data seed	charly config <image> --no-seed	Skip data provisioning
Keep mounts	charly config <image> --keep-mounted	Keep encrypted volumes mounted after setup
Show status	charly config status <image>	Show encrypted volume status
Mount volumes	charly config mount <image>	Mount encrypted volumes
Unmount volumes	charly config unmount <image>	Unmount encrypted volumes
Change password	charly config passwd <image>	Change gocryptfs password
Remove config	charly config remove <image>	Remove quadlet and disable service

Subcommands

Subcommand	Description
setup (default)	Full setup: quadlet + secrets + encrypted volumes + data seed
status	Show encrypted volume mount status
mount	Mount encrypted volumes
unmount	Unmount encrypted volumes
passwd	Change gocryptfs password
remove	Remove quadlet file and disable systemd service

Setup Flags

Flag	Short	Default	Description
--tag		latest	Image tag to use
--build			Force local build instead of pulling
--env	-e		Set container env var (KEY=VALUE), merged with existing vars (upsert by key)
--clean	-c		Replace all env vars instead of merging (clean slate)
--env-file			Load env vars from file
--instance	-i		Instance name (multiple containers of same image)
--port	-p		Remap host port (newHost:containerPort)
--keep-mounted			Keep encrypted volumes mounted after setup
--password		auto	auto: generate secrets, manual: prompt for each
--volume	-v		Configure volume backing (name:type[:path]). Type: volume|bind|encrypted
--bind			Shorthand: configure volume as bind mount (name or name=path)
--encrypt			Shorthand: configure volume as encrypted (gocryptfs)
--seed		true	Seed image volumes (bind mounts AND named volumes) with data from the image’s data candies
--no-seed			Disable data seeding
--force-seed			Re-seed even if target directory is not empty
--data-from			Seed data from a different data image
--no-autodetect			Disable GPU/device auto-detection (skips DRINODE, DRI_NODE, HSA_OVERRIDE_GFX_VERSION injection)
--ssh-key		auto	SSH public key: auto (default ~/.ssh key), path to .pub file, generate, or none
--update-all			Regenerate quadlets for all other deployed images to pick up service env changes
--memory-max			Cgroup memory.max hard OOM limit (e.g. 6g, 500m). Persists to charly.yml.
--memory-high			Cgroup memory.high soft limit — reclaim pressure kicks in before OOM. Persists to charly.yml.
--memory-swap-max			Cgroup memory.swap.max ceiling (e.g. 2g). Persists to charly.yml.
--cpus			CPU quota in cores (e.g. 2.5 for 2.5 cores). Persists to charly.yml.

How It Works

1. Requires run_mode=quadlet (errors if set to direct)
2. Resolves image reference (local or remote github.com/...)
3. Ensures image exists in run engine (transfers if needed)
4. Extracts metadata from OCI image labels
5. Generates quadlet .container file in ~/.config/containers/systemd/
6. Provisions container secrets (from ai.opencharly.secret label)
7. Resolves volume backing (named, bind, or encrypted)
8. Initializes encrypted volumes (gocryptfs) if configured
9. Seeds data candies into the image’s volumes (bind mounts AND podman named volumes)
10. Runs systemctl --user daemon-reload
11. Injects env_provide entries from image labels into charly.yml provides.env: (resolves {{.ContainerName}} templates)
12. Injects mcp_provide entries from image labels into charly.yml provides.mcp: (resolves templates, defaults transport to http)
13. Synthesizes CHARLY_MCP_SERVERS JSON env var for consumer containers (pod-aware: same-image entries resolve to localhost)
14. Warns about missing mcp_require servers (same pattern as env_require warnings)
15. If --update-all, regenerates quadlets for all other deployed images (preserving Instance, Tunnel, PodName, Sidecars, and instance-scoped volume names) and reloads systemd

Volume Backing

Volumes declared in charly.yml default to named volumes. At charly config time, backing can be changed per-volume:

# Named volume (default)
charly config my-app

# Bind mount to host directory
charly config my-app --bind workspace=~/project
charly config my-app -v workspace:bind:~/project    # Equivalent

# Encrypted (gocryptfs)
charly config my-app --encrypt data
charly config my-app -v data:encrypted              # Equivalent
charly config my-app -v data:encrypt:/mnt/ssd       # With explicit path

# Multiple volumes
charly config my-app --bind workspace=~/project --encrypt data -v models:bind

Auto-path for bind without explicit host path: <volumes_path>/<image>/<name> (default: ~/.local/share/charly/volumes/).

Bind-mounting a project checkout for charly mcp serve

The charly-mcp layer declares a project volume at /workspace (the volume NAME stays project for a stable deployer API) and sets env: CHARLY_PROJECT_DIR=/workspace. Bind-mount your opencharly checkout at config time so build-mode MCP tools (box.build, box.list.boxes, box.inspect) can read charly.yml. Alternatively, skip the bind-mount and charly mcp serve will auto-fall back to the upstream opencharly/charly repo (see /charly-build:charly-mcp-cmd “Project-dir wiring”):

charly config charly-arch --bind project=/home/you/opencharly
charly start charly-arch
charly check live charly-arch --filter mcp
# → the baked mcp: call box.list.boxes step lists images from the bind-mounted /home/you/opencharly

The CHARLY_PROJECT_DIR env var is consumed by the charly binary’s global -C / --dir / CHARLY_PROJECT_DIR flag (charly/main.go calls os.Chdir(Dir) before Kong dispatch). See /charly-image:image “Project directory resolution” and /charly-build:charly-mcp-cmd “Deployment: the charly-mcp layer” for the full pattern.

Secret Provisioning

Secrets declared in charly.yml secret: field are stored as OCI label metadata. At config time:

• --password auto (default): generates random passwords for all secrets
• --password manual: prompts for each secret

Idempotent: existing Podman secrets are never overwritten. To force re-provisioning: charly config <image> --refresh-secret <name> (repeatable; all rotates every secret of the image, sidecars included; a candy-owned auto-generated secret gets a NEW value — re-initialize services that stored the old one). Unknown names produce a warning naming the image.

Data Seeding

Data candies (candies with data: field) stage files into /data/<volume>/<dest>/ at build time. At config time:

• First config (--seed, default true): copies staged data into the image’s volumes (both bind mounts and named volumes)
• Subsequent config: skips if data_seeded flag is set in charly.yml
• --force-seed: re-seeds even if directory is not empty
• --data-from <image>: seeds from a separate data image instead of the target image

Volume-kind dispatch

Seeding runs for both volume backings, with a minor difference in how podman is invoked:

• Bind mount (--bind <name> or --bind <name>=<path>, or type: bind in charly.yml): the seeder runs podman run --rm -v <host-path>:/seed --userns=keep-id:uid=<UID>,gid=<GID> <image> bash -c "cp -a /data/<vol>/. /seed/". The --userns=keep-id aligns the in-container UID with the real host UID so files end up owned by the host user.
• Named volume (the default): the seeder runs podman run --rm -v <charly-image-name>:/seed <image> bash -c "cp -a /data/<vol>/. /seed/" — without --userns=keep-id. Named volumes live in the rootless subuid space; the runtime container reads them without keep-id, so the seeder must write with the same identity.

For FROM scratch data images (data_image: true), bind-mount targets use podman create + podman cp (the simpler path), and named-volume targets use podman run --mount type=image,src=<scratch>,dst=/staging,rw=false with a lightweight busybox:stable helper image as the runnable side (pulled lazily on first use).

Emptiness check

DataProvisionInitial only runs when the target is empty:

• Bind mount: checks the per-entry subdirectory (<bind-root>/<dest>/) via os.ReadDir, so data candies with distinct dest: values can coexist in the same bind mount.
• Named volume: checks the volume root via podman volume inspect --format {{.Mountpoint}} followed by os.ReadDir of the returned path. Per-entry subdirectory checks aren’t available without exec’ing into a container, so multiple entries targeting the same named volume all run on the initial seed and then transition to merge-safe cp -an on subsequent runs.

Data candy ordering (bind mounts only)

For bind-mounted targets, data candies that target the volume root (dest: absent or empty — e.g. notebook-templates, which drops getting-started.ipynb directly into ~/workspace/) should be listed first in the box’s candy: list. A root-targeted candy ordered after subdirectory-targeted candies will see the root as non-empty (because subdirs from earlier candies exist) and skip. This is a convention, not a hard-enforced rule.

This ordering caveat does not apply to named-volume targets, where the initial seed runs against the whole volume regardless of sub-paths.

Encrypted Volumes

Encrypted volumes use gocryptfs. Each volume gets {cipher,plain} subdirectories:

• Default path: <encrypted_storage_path>/charly-<image>-<name>/
• Explicit path: --volume name:encrypt:/path stores directly at /path/{cipher,plain}
• Mounted via ExecStartPre=charly config mount in the quadlet
• Each mount runs in a systemd-run --scope unit (survives container restart)
• -allow_other flag for rootless podman with --userns=keep-id

Fast path: charly config mount short-circuit

When every requested encrypted volume for an image is already mounted — the typical state on service restart, because charly-enc-<image>-<volume>.scope units survive container stop/restart independently of the service’s cgroup — charly config mount <image> short-circuits and returns without touching the credential store at all. Output is:

All encrypted volumes for <image> already mounted (N/N)

This makes service restarts (charly restart <image>) resilient to temporary keyring backend problems: the only reason to query the keyring is to get the passphrase for a fresh gocryptfs -init or mount, and the short-circuit skips that entirely when no new mount is needed. A broken default alias in the Secret Service — for example, KeePassXC’s FdoSecrets plugin advertising a stub collection — does NOT block restarts.

When a volume IS unmounted and needs to be remounted, the normal path runs: resolveEncPassphraseForMount queries the credential store via the iteration-capable ssClient (not just the Secret Service default alias), so even then the broken-stub scenario still resolves automatically by finding the credential in a sibling healthy collection. See /charly-automation:enc for the full iteration order, the bounded encMountDeadline retry behavior, and the source classification (env/keyring/config/locked/unavailable/default).

Resource Caps

Memory and CPU caps flow through the same security: block as shm_size. Layers can declare defaults; image/deploy overrides replace them. CLI flags on charly config persist to charly.yml and take effect on the next quadlet regeneration.

# Box-level default (all instances)
charly config selkies-desktop --memory-max=6g --memory-high=5g --memory-swap-max=2g

# Per-instance override (tighter cap for one instance)
charly config selkies-desktop -i 192.241.92.221 --memory-max=8g

# CPU quota on an unrelated image
charly config jupyter --memory-max=16g --cpus=8

Merge rules (see charly/security.go):

• Layers → image: smallest value wins (minCap / minCpus). A tighter cap is a smaller blast radius, so it’s the safer default.
• Box-level and deploy-level overrides: full replace, identical to how shm_size is handled.

Emitted as native systemd cgroup directives (MemoryMax=, MemoryHigh=, MemorySwapMax=, CPUQuota=) in the quadlet’s [Service] section, guaranteed to work on every systemd version charly targets. For the runtime (non-quadlet) path, SecurityArgs also emits the equivalent podman run --memory / --memory-reservation / --memory-swap / --cpus flags.

CPUQuota uses systemd’s percentage form — --cpus=2.5 → CPUQuota=250% (one full core is 100%).

Gotchas

• Lowercase suffixes (6g) are auto-normalized to 6G. systemd silently parses lowercase as infinity — no error, just no limit — so charly coerces everything to the canonical uppercase form before emitting the quadlet.
• Field-level merge in deploy means --memory-max won’t wipe co-set fields like shm_size. Unset CLI fields fall through to layer/image defaults rather than being replaced with zero values.
• Resource caps merge smallest-wins across layers (tightest cap = smallest blast radius). Box-level and deploy-level overrides replace entirely.

Port-conflict detection

When a -p HOST:CONTAINER flag publishes onto a host port that another listener already holds, charly config emits a soft warning (does not abort) and suggests a remap:

Warning: port conflicts detected:
  Port 13000 is in use
    Fix: find and stop the process using port 13000
    Or remap: charly start openclaw-desktop --port 13001:3000
Wrote /home/user/.config/containers/systemd/charly-<image>-<instance>.container

The quadlet is still written with the conflicting port, so charly start will fail at bind time unless you either free the port, re-run charly config with a remap, or edit charly.yml. Detection uses a local net.Listen probe per published port at configure time. Handy for multi-instance deployments alongside a production fleet (e.g., running /charly-openclaw:openclaw-desktop as a test instance while /charly-selkies:selkies-labwc holds the canonical 3000/9222/9224/2222 range).

Deploy State

All configuration is persisted to ~/.config/charly/charly.yml in the compact node-form — a version: stamp, an optional top-level provides: directive, and each deploy as a name-first <name>: {<substrate-kind>: <body>} entry whose substrate-kind value carries the scalars, collections (port:/volume:/…), and plan: inline, with any nested/peer members as sibling child nodes (no deploy: map wrapper, no target: field — the substrate kind at the edge selects the target):

my-app:
  pod:
    image: my-app
    tag: latest
    data_seeded: true
    data_source: "my-app:latest"
    volume:
      - name: workspace
        type: bind
        host: ~/project

Common Workflows

Deploy a Jupyter notebook server

charly config jupyter-ml-notebook --bind workspace=~/notebooks
charly start jupyter-ml-notebook
# Open http://localhost:8888

Deploy with encrypted model cache

charly config ollama --encrypt models
# Prompted for gocryptfs password on first setup
charly start ollama

Remove and reconfigure

charly config remove my-app
charly config my-app --bind workspace=/new/path

Full instance removal (important: 3-step cleanup)

charly config remove disables the systemd service but does NOT clean the charly.yml entry. Running --update-all before cleaning charly.yml will re-create quadlets from stale entries. Full cleanup requires:

charly config remove <image> -i <instance>     # 1. Stop & disable service
charly bundle reset <image> -i <instance>       # 2. Remove charly.yml entry
charly remove <image> -i <instance>         # 3. Remove container + quadlet (reloads systemd)
charly reap-orphans                         # 4. Clear ghost units (optional)

Only THEN run charly config <image> --update-all to propagate the clean state.

Multi-instance proxy deployment

Deploy multiple browser instances with different HTTP proxies (e.g., for selkies-desktop):

charly config selkies-desktop -i 198.145.102.110 \
  -e HTTP_PROXY=http://198.145.102.110:5466 \
  -e HTTPS_PROXY=http://198.145.102.110:5466 \
  -e "NO_PROXY=localhost,127.0.0.1" \
  -p 3006:3000 -p 9236:9222
charly start selkies-desktop -i 198.145.102.110

Each instance gets unique host ports. The Chrome layer’s chrome-wrapper translates HTTP_PROXY/HTTPS_PROXY into Chrome’s --proxy-server flag. Verify with the cdp: check verb (served out-of-process by candy/plugin-cdp) — author cdp: status / cdp: open (url: https://ip.me) / cdp: eval (expression: document.querySelector('#ip-lookup').value) steps and run them against the instance:

charly check live selkies-desktop -i 198.145.102.110 --filter cdp

Service Environment Injection

When a configured image declares env_provide or mcp_provide in its layers (stored in OCI labels), charly config automatically injects those entries into the provides: section of charly.yml. This enables cross-container service discovery without manual configuration. Verify that an injected MCP endpoint is actually reachable with the mcp: check verb (charly check live <image> --filter mcp) — see /charly-build:charly-mcp-cmd for the full verb surface.

# charly.yml after `charly config ollama && charly config jupyter`
provides:
  env:
    - name: OLLAMA_HOST
      value: http://charly-ollama:11434
      source: ollama
  mcp:
    - name: jupyter
      url: http://charly-jupyter:8888/mcp
      transport: http
      source: jupyter
ollama:
  pod:
    image: ollama
jupyter:
  pod:
    image: jupyter

Self-exclusion (env): An image’s own env_provide vars are filtered out of its own environment — the image uses its own env: (e.g., OLLAMA_HOST=0.0.0.0), not the service discovery URL.

Pod-aware (MCP): When provider and consumer share a container, MCP URLs resolve to localhost instead of container hostname. No self-exclusion for MCP — same-container consumers always see their own MCP servers.

Propagation: Use --update-all to regenerate quadlets for all other deployed images so they pick up the new env vars immediately. Without --update-all, other images pick up the env vars on their next charly config or charly update.

Cleanup: charly config remove and charly remove automatically remove the service’s injected vars from the global env.

See /charly-image:layer for env_provide field documentation.

Instance-Aware MCP Server Naming

When deploying with -i <instance>, injectMCPProvides appends -<instance> to each MCP server name. This prevents naming collisions when multiple instances of the same image provide the same MCP server:

# Base deployment — MCP name: "chrome-devtools"
charly config selkies-desktop --update-all

# Instance deployment — MCP name: "chrome-devtools-31.58.9.4"
charly config selkies-desktop -i 31.58.9.4 \
  -e HTTP_PROXY=http://31.58.9.4:6077 \
  -p 3001:3000 --update-all

Result in charly.yml provides.mcp:

- name: chrome-devtools
  url: http://charly-selkies-desktop:9224/mcp
  source: selkies-desktop
- name: chrome-devtools-31.58.9.4
  url: http://charly-selkies-desktop-31.58.9.4:9224/mcp
  source: selkies-desktop/31.58.9.4

Consumers (e.g., hermes) see both as distinct MCP servers in CHARLY_MCP_SERVERS. On re-config, stale MCP entries from the same source are automatically cleaned before new entries are injected.

Source: charly/config_image.go (injectMCPProvides).

Hermes LLM Provider Auto-Configuration Example

The hermes layer uses -e env vars to auto-configure its LLM provider on first start. Pass the API key at config time:

# Ollama Cloud
charly config hermes -e OLLAMA_API_KEY=your-key

# OpenRouter
charly config hermes -e OPENROUTER_API_KEY=sk-or-xxx

# Local Ollama (OLLAMA_HOST auto-injected by charly config ollama --update-all)
charly config ollama --update-all
charly config hermes

All providers whose keys are present get registered simultaneously. Priority (OLLAMA_HOST > OLLAMA_API_KEY > OPENROUTER_API_KEY) only determines the default. Override model with -e HERMES_MODEL=.... See /charly-hermes:hermes for auto-provider-config details.

Open WebUI Auto-Configuration Example

Open WebUI uses env_require for mandatory admin credentials and env_accept for optional LLM providers:

# Minimal: admin credentials required (hard error if missing)
eval "$(charly secrets gpg env)"
charly config openwebui \
  -e "WEBUI_ADMIN_EMAIL=$WEBUI_ADMIN_EMAIL" \
  -e "WEBUI_ADMIN_PASSWORD=$WEBUI_ADMIN_PASSWORD" \
  -e "OPENROUTER_API_KEY=$OPENROUTER_API_KEY" \
  -e "OLLAMA_API_KEY=$OLLAMA_API_KEY" \
  --update-all

# Full workstation: Ollama + Jupyter + OpenWebUI
charly config ollama
charly config jupyter --update-all
charly config openwebui ... --update-all

The entrypoint auto-configures: OpenRouter + Ollama Cloud as semicolon-separated OPENAI_API_BASE_URLS, MCP servers from CHARLY_MCP_SERVERS → TOOL_SERVER_CONNECTIONS, Jupyter code execution from co-deployed jupyter container. ENABLE_OLLAMA_API is disabled unless a local Ollama is deployed via env_provide. See /charly-openwebui:openwebui for details.

env_require Enforcement

Layers can declare env_require in charly.yml for mandatory environment variables. charly config performs a hard check after resolving all env vars — if any required var is missing, it aborts before writing the quadlet and prints clear instructions:

Error: openwebui requires the following environment variable(s):

  WEBUI_ADMIN_EMAIL — Admin email — pass via: charly config openwebui -e [email protected]

Set them with -e flags, --env-file, or charly.yml env:

  charly config openwebui -e WEBUI_ADMIN_EMAIL=...

Source: charly/config_image.go (checkMissingEnvRequires).

secret_require Enforcement

Parallel to env_require but for credential-backed env vars. Layers declare secret_require in charly.yml (see /charly-image:layer). charly config resolves each entry from the credential store via ResolveCredential and, if any required value is not stored, aborts with a clear remediation message:

Error: openwebui requires the following credential-backed secret(s):

  WEBUI_ADMIN_PASSWORD — Initial admin account password for Open WebUI first-run setup

Store them in the credential backend. For each entry:

  charly secrets set charly/secret WEBUI_ADMIN_PASSWORD <value>

Alternatively, pass the value once via -e; it will be auto-imported:

  charly config openwebui -e WEBUI_ADMIN_PASSWORD=...

Source: charly/config_image.go (checkMissingSecretRequires).

Plaintext-to-Credential Migration Hook

When charly config <image> runs, it automatically migrates any existing plaintext NAME=VAL entry in charly.yml’s env: list whose NAME is now declared as secret_accept / secret_require on the image. The sequence:

1. Scan dc.Images[deployKey(image, instance)].Env for names that match meta.SecretAccepts / meta.SecretRequires
2. For each match: copy the value to the credential store at the layer-declared (service, key) path (default charly/secret/<NAME>), remove the entry from dc.Env, mark the deploy config dirty
3. On first mutation, back up charly.yml → charly.yml.bak.<unix-timestamp>
4. Persist the cleaned deploy config via SaveBundleConfig
5. Log each migrated entry on stderr: "Migrated plaintext OPENROUTER_API_KEY from charly.yml to credential store (charly/api-key/openrouter)"

Idempotent — running on a clean host is a no-op. This gives pre-upgrade hosts an automatic one-time cleanup with a rollback point preserved.

Source: charly/config_secret_migration.go (MigratePlaintextEnvSecrets).

-e Auto-Import for secret_accept / secret_require

When a -e NAME=VAL flag targets an env var declared as secret_accept / secret_require on the image, charly config auto-imports the value into the credential store and strips it from c.Env before the plaintext env merge runs. The stderr output shows each imported key:

Imported WEBUI_ADMIN_PASSWORD into credential store (charly/secret/WEBUI_ADMIN_PASSWORD)
Imported OPENROUTER_API_KEY into credential store (charly/api-key/openrouter)

The normal secret resolution path then picks up the value from the backend on the same charly config invocation. First-time setup is a single command; subsequent runs don’t need -e.

Plain env_accept / env_require entries are unaffected — their -e values continue to flow through the plaintext env merge into charly.yml and the quadlet as before.

Source: charly/config_secret_migration.go (scrubSecretCLIEnv).

Provides Filtering (env_accept / env_require opt-in)

env_provide is the supply side of cross-container env discovery. env_accept and env_require are the demand side. The provide-resolution pipeline in provides.go intersects the two sets per consumer, so env vars flow through charly.yml’s provides: section only to consumers that explicitly asked for them.

Why filtering exists. Without it, every deployed service would see every other service’s env_provide — a chrome layer would receive tailscale sidecar TS_* vars, a postgres layer would receive ollama’s OLLAMA_HOST, and the env table would quickly become noise. Explicit opt-in via env_accept/env_require is how we enforce the principle that services must declare the contracts they rely on.

Resolution per variable:

Consumer declared	Provider deployed	Result
env_require: [X] (no default)	yes (X in env_provide)	X resolved, injected via provides:
env_require: [X] (no default)	no	charly config aborts with a hard error
env_require: [X] with default	no	default used
env_accept: [X]	yes	X resolved, injected
env_accept: [X]	no	var silently omitted
neither accepts nor requires X	yes	var is silently dropped (filtering in action)
neither accepts nor requires X	no	nothing happens

Sidecar interaction. Sidecars (e.g., the tailscale sidecar) participate in the same filtering pipeline — their TS_* env set is routed to the sidecar container, not auto-merged into the app container. For the app to see anything from the sidecar, it must declare env_accept: [<var>] or env_require: [<var>]. See /charly-automation:sidecar (Environment Contract) for the pattern.

--update-all effect. When filtering rules change (e.g., a candy adds a new env_accept entry), charly config <any-image> --update-all re-runs the resolution pipeline for every deployed image and writes updated provides: blocks to their quadlets. Propagation is atomic per-image.

Source: charly/provides.go (resolution, filtering, {{.ContainerName}} templating), charly/config_image.go (injectEnvProvides, injectMCPProvides, checkMissingEnvRequires).

Sidecar Attachment

Attach a sidecar container at deploy time:

charly config --list-sidecars                    # List built-in sidecar templates
charly config <image> --sidecar tailscale        # Attach tailscale sidecar
charly config <image> --sidecar tailscale \
  -e TS_HOSTNAME=my-app \
  -e "TS_EXTRA_ARGS=--exit-node=<ip> --exit-node-allow-lan-access"

• --sidecar <name> — Attach sidecar (repeatable). Saved to charly.yml
• CLI -e env vars matching sidecar template keys (e.g., TS_*) are auto-routed to the sidecar, not the app container
• Generates pod + sidecar + app quadlet files (3 instead of 1)

See /charly-automation:sidecar for full sidecar documentation.

Environment Variable Handling

Merge behavior (default): -e performs upsert — new vars override existing vars with the same key; existing vars not in the new set are preserved. This means charly config setup -e HTTP_PROXY=... adds the proxy without dropping existing vars like SSH_AUTHORIZED_KEYS.

Clean behavior (-c): -c/--clean replaces the entire env list in charly.yml. Use when you want to reset env vars to exactly what’s specified on the command line.

Kong sep:"none" on all -e flags means commas in values are preserved (no splitting). NO_PROXY=localhost,127.0.0.1 works correctly as a single env var.

normalizeNoProxy() auto-converts semicolons to commas in NO_PROXY/no_proxy values during env resolution. Legacy semicolon values in charly.yml are auto-healed.

NO_PROXY enrichment: When HTTP_PROXY or HTTPS_PROXY is present, charly config automatically appends all deployed container hostnames to NO_PROXY. This is necessary because Chrome does not support CIDR ranges in NO_PROXY (unlike curl) — without explicit hostnames, Chrome routes internal traffic like http://charly-immich-ml:2283 through the external proxy, causing Bad Gateway errors. Applied in both the main config path and --update-all. Source: charly/envfile.go (enrichNoProxy), charly/deploy.go (DeployedContainerNames).

Tunnel persistence: charly config setup automatically persists tunnel config from charly.yml back to charly.yml via saveDeployState. Tunnel is a deploy-time concern — see /charly-core:deploy for tunnel configuration.

Tunnel is charly.yml-only: labels.go:238 deliberately skips parsing the ai.opencharly.tunnel OCI image label. Tunnel config is ONLY sourced from charly.yml. New instances created with charly config setup -i <name> do NOT inherit tunnel config from the base image’s charly.yml entry — you must manually add tunnel: {provider: tailscale, private: all} to the instance’s charly.yml entry, then re-run charly config setup to regenerate the quadlet with ExecStartPost=tailscale serve commands.

Source: charly/envfile.go (normalizeNoProxy), charly/deploy.go (mergeEnvVars, saveDeployState), sep:"none" in config_image.go/shell.go/commands.go/start.go.

Cross-References

Prerequisites

• /charly-build:pull — Required before charly config can read OCI labels. Remote refs (@github.com/...) are rejected with a redirect to charly box pull. If the image isn’t local, ExtractMetadata returns ErrImageNotLocal and the CLI prompts for a pull.

Deploy-mode neighbors

• /charly-automation:sidecar — Sidecar containers, pod networking, Tailscale exit nodes, Environment Contract (how sidecars participate in provides filtering)
• /charly-core:start — Requires charly config first in quadlet mode
• /charly-core:deploy — Deploy state file (charly.yml), sidecar pod deployment, tunnel lifecycle, instance tunnel inheritance, resource caps persistence
• /charly-automation:enc — Encrypted storage details
• /charly-build:secrets — Container secret management, charly secrets gpg set TS_AUTHKEY
• /charly-build:settings — Runtime settings (engine, run_mode, encrypted_storage_path)
• /charly-core:service — Service lifecycle (start, stop, status, logs)
• /charly-image:layer — Volume, secret, env_provide / env_require / env_accept declarations, security resource cap fields, service: blocks
• /charly-image:image — Image composition, inheritance, OCI label emission, tunnel charly.yml-only note (labels.go:238)
• /charly-core:charly-doctor — Host GPU/device detection driving appendAutoDetectedEnv() (DRINODE, HSA_OVERRIDE_GFX_VERSION)
• /charly-core:shell — Interactive shells share the same appendAutoDetectedEnv() path
• /charly-selkies:chrome — Chrome HTTP proxy (env_accept), NO_PROXY auto-enrichment, cgroup resource caps
• /charly-infrastructure:supervisord — Event listener pattern that pairs with the resource caps
• /charly-distros:nvidia, /charly-distros:rocm — GPU layers that consume DRINODE auto-injection
• /charly-selkies:selkies — Pixelflux DRINODE consumer + ScreenCapture singleton

When to Use This Skill

MUST be invoked when the task involves charly config commands, image deployment setup, quadlet generation, sidecar attachment, secret provisioning, encrypted volumes, data seeding, or volume backing configuration. Invoke this skill BEFORE reading source code or launching Explore agents.

Workflow position: After build, before start. charly box build → charly config → charly start.

Source: charly/config_image.go (command structs), charly/quadlet.go (quadlet generation), charly/deploy.go (deploy state), charly/enc.go (encrypted volumes), charly/secrets.go (secret provisioning), charly/data.go (data seeding).

Live-deploy verification: see /charly-check:check (the 10 Testing Standards) and /charly-internals:disposable.