codewhale/docs/CONFIGURATION.md

# Configuration

DeepSeek TUI reads configuration from a TOML file plus environment variables.
At process startup it also loads a workspace-local `.env` file when present.
Use the tracked `.env.example` as the template; copy it to `.env`, then edit
only the provider and safety knobs you need.

## Where It Looks

Default config path:

- `~/.deepseek/config.toml`

Overrides:

- CLI: `deepseek --config /path/to/config.toml`
- Env: `DEEPSEEK_CONFIG_PATH=/path/to/config.toml`

If both are set, `--config` wins. Environment variable overrides are applied after the file is loaded.

### Per-project overlay (#485)

When the TUI starts in a workspace that contains a
`<workspace>/.deepseek/config.toml` file, the values declared in that
file are merged on top of the global config. This lets a repo lock its
own provider, model, sandbox policy, or approval policy without
touching the user's `~/.deepseek/config.toml`. Pass
`--no-project-config` to skip the overlay for one launch.

Supported keys in the project overlay (top-level fields only):

| Key | Effect |
|---|---|
| `provider` | switch backend (e.g. `"nvidia-nim"` for an enterprise repo) |
| `model` | override `default_text_model` |
| `api_key` | use a per-repo key (typically read from `.env`, **not committed**) |
| `base_url` | point at a self-hosted endpoint |
| `reasoning_effort` | force `"high"` / `"max"` for a complex repo |
| `approval_policy` | `"never"` / `"on-request"` / `"untrusted"` for opinionated repos |
| `sandbox_mode` | `"read-only"` / `"workspace-write"` / `"danger-full-access"` |
| `mcp_config_path` | per-repo MCP server set |
| `notes_path` | keep notes in-repo |
| `max_subagents` | clamp concurrency for a constrained repo (clamped to 1..=20) |
| `allow_shell` | gate shell tool access on `false` |

The overlay is intentionally narrow — it covers the fields a repo
maintainer is most likely to want to standardize across contributors.
Other settings (skills_dir, hooks, capacity, retry, etc.) stay
user-global. If your repo needs more, file an issue describing the
specific use case.

The `deepseek` facade and `deepseek-tui` binary share the same config file for
DeepSeek auth and model defaults. `deepseek login --api-key ...` writes the
root `api_key` field that `deepseek-tui` reads directly, and `deepseek --model
deepseek-v4-flash` is forwarded to the TUI as `DEEPSEEK_MODEL`.

For hosted or self-hosted DeepSeek V4 providers, set `provider = "nvidia-nim"`,
`"fireworks"`, or `"sglang"` or pass `deepseek --provider <name>`. The facade
stores provider credentials under `[providers.<name>]` and forwards the resolved
key, base URL, provider, and model to the TUI process. Use
`deepseek auth set --provider nvidia-nim --api-key "YOUR_NVIDIA_API_KEY"` or
`deepseek auth set --provider fireworks --api-key "YOUR_FIREWORKS_API_KEY"` to
save hosted-provider keys through the facade. SGLang is self-hosted and can run
without an API key by default.

To bootstrap MCP and skills directories at their resolved paths, run `deepseek-tui setup`.
To only scaffold MCP, run `deepseek-tui mcp init`.

Note: setup, doctor, mcp, features, sessions, resume/fork, exec, review, and eval
are subcommands of the `deepseek-tui` binary. The `deepseek` dispatcher exposes a
distinct set of commands (`auth`, `config`, `model`, `thread`, `sandbox`,
`app-server`, `mcp-server`, `completion`) and forwards plain prompts to
`deepseek-tui`.

## Profiles

You can define multiple profiles in the same file:

```toml
api_key = "PERSONAL_KEY"
default_text_model = "deepseek-v4-pro"

[profiles.work]
api_key = "WORK_KEY"
base_url = "https://api.deepseek.com"

[profiles.nvidia-nim]
provider = "nvidia-nim"
api_key = "NVIDIA_KEY"
base_url = "https://integrate.api.nvidia.com/v1"
default_text_model = "deepseek-ai/deepseek-v4-pro"

[profiles.fireworks]
provider = "fireworks"
default_text_model = "accounts/fireworks/models/deepseek-v4-pro"

[profiles.sglang]
provider = "sglang"
base_url = "http://localhost:30000/v1"
default_text_model = "deepseek-ai/DeepSeek-V4-Pro"
```

Select a profile with:

- CLI: `deepseek --profile work`
- Env: `DEEPSEEK_PROFILE=work`

If a profile is selected but missing, DeepSeek TUI exits with an error listing available profiles.

## Environment Variables

These override config values:

- `DEEPSEEK_API_KEY`
- `DEEPSEEK_BASE_URL`
- `DEEPSEEK_PROVIDER` (`deepseek|nvidia-nim|openrouter|novita|fireworks|sglang`)
- `DEEPSEEK_MODEL` or `DEEPSEEK_DEFAULT_TEXT_MODEL`
- `NVIDIA_API_KEY` or `NVIDIA_NIM_API_KEY` (preferred when provider is `nvidia-nim`; falls back to `DEEPSEEK_API_KEY`)
- `NVIDIA_NIM_BASE_URL`, `NIM_BASE_URL`, or `NVIDIA_BASE_URL`
- `NVIDIA_NIM_MODEL`
- `FIREWORKS_API_KEY`
- `FIREWORKS_BASE_URL`
- `SGLANG_BASE_URL`
- `SGLANG_MODEL`
- `SGLANG_API_KEY` (optional; many localhost SGLang servers do not require auth)
- `DEEPSEEK_LOG_LEVEL` or `RUST_LOG` (`info`/`debug`/`trace` enables lightweight verbose logs)
- `DEEPSEEK_SKILLS_DIR`
- `DEEPSEEK_MCP_CONFIG`
- `DEEPSEEK_NOTES_PATH`
- `DEEPSEEK_MEMORY_PATH`
- `DEEPSEEK_ALLOW_SHELL` (`1`/`true` enables)
- `DEEPSEEK_APPROVAL_POLICY` (`on-request|untrusted|never`)
- `DEEPSEEK_SANDBOX_MODE` (`read-only|workspace-write|danger-full-access|external-sandbox`)
- `DEEPSEEK_MANAGED_CONFIG_PATH`
- `DEEPSEEK_REQUIREMENTS_PATH`
- `DEEPSEEK_MAX_SUBAGENTS` (clamped to `1..=20`)
- `DEEPSEEK_TASKS_DIR` (runtime task queue/artifact storage, default `~/.deepseek/tasks`)
- `DEEPSEEK_ALLOW_INSECURE_HTTP` (`1`/`true` allows non-local `http://` base URLs; default is reject)
- `DEEPSEEK_CAPACITY_ENABLED`
- `DEEPSEEK_CAPACITY_LOW_RISK_MAX`
- `DEEPSEEK_CAPACITY_MEDIUM_RISK_MAX`
- `DEEPSEEK_CAPACITY_SEVERE_MIN_SLACK`
- `DEEPSEEK_CAPACITY_SEVERE_VIOLATION_RATIO`
- `DEEPSEEK_CAPACITY_REFRESH_COOLDOWN_TURNS`
- `DEEPSEEK_CAPACITY_REPLAN_COOLDOWN_TURNS`
- `DEEPSEEK_CAPACITY_MAX_REPLAY_PER_TURN`
- `DEEPSEEK_CAPACITY_MIN_TURNS_BEFORE_GUARDRAIL`
- `DEEPSEEK_CAPACITY_PROFILE_WINDOW`
- `DEEPSEEK_CAPACITY_PRIOR_CHAT`
- `DEEPSEEK_CAPACITY_PRIOR_REASONER`
- `DEEPSEEK_CAPACITY_PRIOR_V4_PRO`
- `DEEPSEEK_CAPACITY_PRIOR_V4_FLASH`
- `DEEPSEEK_CAPACITY_PRIOR_FALLBACK`
- `NO_ANIMATIONS` (`1|true|yes|on` forces `low_motion = true` and
  `fancy_animations = false` at startup, regardless of the saved
  settings; see [`docs/ACCESSIBILITY.md`](./ACCESSIBILITY.md)).
- `SSL_CERT_FILE` — corporate-proxy / TLS-inspecting MITM users
  point this at a PEM bundle (or single DER cert) and the cert(s)
  get added alongside the platform's system trust store. Failures
  log a warning and continue — the existing system roots still
  apply.

### Instruction sources (`instructions = [...]`, #454)

Add a list of additional system-prompt sources that get
concatenated, in declared order, alongside the auto-loaded
`AGENTS.md`:

```toml
instructions = [
    "./AGENTS.md",
    "~/.deepseek/global.md",
    "~/team/agents-shared.md",
]
```

Rules:

- Paths run through `expand_path` so `~` and env vars work.
- Each file is capped at 100 KiB; oversized files are
  truncated with a `[…elided]` marker rather than skipped.
- Missing files are skipped with a tracing warning so a stale
  entry doesn't fail the launch.
- Project config (`<workspace>/.deepseek/config.toml`)
  **replaces** the user array wholesale rather than merging.
  If you want both, list `~/global.md` inside the project
  array. Set `instructions = []` in the project to clear the
  user list for that repo.

### `/hooks` listing

Run `/hooks` (or `/hooks list`) inside the TUI to see every
configured lifecycle hook grouped by event, including each
hook's name, command preview, timeout, and condition. The
`[hooks].enabled` flag's state is shown at the top so it's
obvious when hooks are globally suppressed. Hooks are
configured under `[[hooks.hooks]]` entries — see the existing
hook-system documentation for the full schema.

### Composer stash (`/stash`, Ctrl+S)

Press **Ctrl+S** in the composer to park the current draft to
`~/.deepseek/composer_stash.jsonl`. `/stash list` shows parked
drafts with one-line previews and timestamps; `/stash pop`
restores the most recently parked draft (LIFO); `/stash clear`
wipes the file. Capped at 200 entries; multiline drafts
round-trip intact.

## Settings File (Persistent UI Preferences)

DeepSeek TUI also stores user preferences in:

- `~/.config/deepseek/settings.toml`

Notable settings include `auto_compact` (default `false`), which opts into
replacement-style summarization only near the active model limit. The default
V4 path preserves the stable message prefix for cache reuse; use manual
`/compact` or enable `auto_compact` only when you explicitly want automatic
replacement compaction. You can inspect or update these from the TUI with
`/settings` and `/config` (interactive editor).

Common settings keys:

- `theme` (default, dark, light, whale)
- `auto_compact` (on/off, default off)
- `paste_burst_detection` (on/off, default on): fallback rapid-key paste
  detection for terminals that do not emit bracketed-paste events. This is
  independent of terminal bracketed-paste mode.
- `show_thinking` (on/off)
- `show_tool_details` (on/off)
- `locale` (`auto`, `en`, `ja`, `zh-Hans`, `pt-BR`; default `auto`): UI chrome
  locale. `auto` checks `LC_ALL`, `LC_MESSAGES`, then `LANG`; unsupported or
  missing locales fall back to English. This does not force model output
  language.
- `default_mode` (agent, plan, yolo; legacy `normal` is accepted and normalized to `agent`)
- `max_history` (number of submitted input history entries; cleared drafts are
  also kept locally for composer history search)
- `default_model` (model name override)

Only `agent`, `plan`, and `yolo` are visible modes in the UI. For compatibility,
older settings files with `default_mode = "normal"` still load as `agent`, and
the hidden `/normal` slash command switches to `Agent`.

Localization scope is tracked in [LOCALIZATION.md](LOCALIZATION.md). The v0.7.6
core pack covers high-visibility TUI chrome only; provider/tool schemas,
personality prompts, and full documentation remain English unless explicitly
translated later.

Readability semantics:

- Selection uses a unified style across transcript, composer menus, and modals.
- Footer hints use a dedicated semantic role (`FOOTER_HINT`) so hint text stays readable across themes.
- The footer includes a compact `coherence` chip that describes how stable and
  focused the current session is right now. Possible states are `healthy`,
  `crowded`, `refreshing`, `verifying`, and `resetting`; these are derived from
  capacity and compaction events without exposing internal formulas in normal UI.

### Token Quantities and Drivers

DeepSeek V4 prefix caching makes token labels matter. These quantities are kept
separate:

| Quantity | Meaning | Allowed to drive |
|---|---|---|
| Active request input estimate | Conservative estimate of the next request's live system prompt and transcript payload. | Header/footer context percent, hard-cycle trigger, opt-in Flash seam trigger, and emergency overflow preflight. |
| Reserved response headroom | The requested `max_tokens` budget plus safety headroom. v0.7.5 keeps normal turns at `262144` output tokens and adds `1024` safety tokens for context-window checks. | Hard-cycle and emergency overflow budget checks only. |
| Cumulative API usage | Provider-reported input plus output tokens summed across completed API calls; multi-tool turns may count the same stable prefix more than once. | Session usage and approximate cost telemetry only. |
| Prompt cache hit/miss | Provider cache telemetry for the most recent call when available. | Cache-hit display and cost estimation only; never compaction, seam, or cycle triggers. |
| Context percent | Active request input estimate divided by the model context window. | Display only; it mirrors the active-input basis used by context safeguards. |
| Cost estimate | Approximate spend from provider usage and configured DeepSeek rates. | Display only. |

For the default V4 path, hard cycles fire when active input reaches the smaller
of the configured cycle threshold (`768000`) and the model window minus reserved
response headroom. Replacement compaction remains opt-in (`auto_compact = false`
by default), the Flash seam manager remains opt-in (`[context].enabled = false`),
and the capacity controller remains disabled unless configured.

### Command Migration Notes

If you are upgrading from older releases:

- Old: `/deepseek`
  New: `/links` (aliases: `/dashboard`, `/api`)
- Old: `/set model deepseek-reasoner`
  New: `/config` and edit the `model` row to `deepseek-v4-pro` or `deepseek-v4-flash`
- Old: visible `Normal` mode or `default_mode = "normal"`
  New: use `Agent` / `default_mode = "agent"`; legacy `normal` still maps to `agent`
- Old: discover `/set` in slash UX/help
  New: use `/config` for editing and `/settings` for read-only inspection

## Key Reference

### Core keys (used by the TUI/engine)

- `provider` (string, optional): `deepseek` (default), `nvidia-nim`, `openrouter`, `novita`, `fireworks`, or `sglang`. `nvidia-nim` targets NVIDIA's NIM-hosted DeepSeek endpoints through `https://integrate.api.nvidia.com/v1`; `fireworks` targets `https://api.fireworks.ai/inference/v1`; `sglang` targets a self-hosted OpenAI-compatible endpoint, defaulting to `http://localhost:30000/v1`.
- `api_key` (string, required): must be non-empty (or set `DEEPSEEK_API_KEY`).
- `base_url` (string, optional): defaults to `https://api.deepseek.com` for DeepSeek's OpenAI-compatible Chat Completions API, or `https://integrate.api.nvidia.com/v1` for `provider = "nvidia-nim"`. `https://api.deepseek.com/v1` is also accepted for SDK compatibility; use `https://api.deepseek.com/beta` only for DeepSeek beta features such as strict tool mode, chat prefix completion, and FIM completion.
- `default_text_model` (string, optional): defaults to `deepseek-v4-pro` for DeepSeek, `deepseek-ai/deepseek-v4-pro` for NVIDIA NIM, `accounts/fireworks/models/deepseek-v4-pro` for Fireworks, and `deepseek-ai/DeepSeek-V4-Pro` for SGLang. Current public DeepSeek IDs are `deepseek-v4-pro` and `deepseek-v4-flash`, both with 1M context windows and thinking mode enabled by default. Legacy `deepseek-chat` and `deepseek-reasoner` remain compatibility aliases for `deepseek-v4-flash`. Provider-specific mappings translate `deepseek-v4-pro` / `deepseek-v4-flash` to each provider's model ID where supported. Use `/models` or `deepseek models` to discover live IDs from your configured endpoint. `DEEPSEEK_MODEL` overrides this for a single process.
- `reasoning_effort` (string, optional): `off`, `low`, `medium`, `high`, or `max`; defaults to the configured UI tier. DeepSeek Platform receives top-level `thinking` / `reasoning_effort` fields. NVIDIA NIM receives equivalent settings through `chat_template_kwargs`.
- `allow_shell` (bool, optional): defaults to `true` (sandboxed).
- `approval_policy` (string, optional): `on-request`, `untrusted`, or `never`. Runtime `approval_mode` editing in `/config` also accepts `on-request` and `untrusted` aliases.
- `sandbox_mode` (string, optional): `read-only`, `workspace-write`, `danger-full-access`, `external-sandbox`.
- `managed_config_path` (string, optional): managed config file loaded after user/env config.
- `requirements_path` (string, optional): requirements file used to enforce allowed approval/sandbox values.
- `max_subagents` (int, optional): defaults to `10` and is clamped to `1..=20`.
- `subagents.*` (optional): per-role/type model defaults for `agent_spawn` and
  related sub-agent tools. Explicit tool `model` values win, then role/type
  overrides, then the parent runtime model. Supported convenience keys are
  `default_model`, `worker_model`, `explorer_model`, `awaiter_model`,
  `review_model`, `custom_model`, and `max_concurrent`. The
  `[subagents] max_concurrent` value overrides top-level `max_subagents` and is
  also clamped to `1..=20`. `[subagents.models]` accepts lower-case role or type
  keys such as `worker`, `explorer`, `general`, `explore`, `plan`, and
  `review`. Values must normalize to a supported DeepSeek model id before an
  agent is spawned.
- `skills_dir` (string, optional): defaults to `~/.deepseek/skills` (each skill is a directory containing `SKILL.md`). Workspace-local `.agents/skills` or `./skills` are preferred when present.
- `mcp_config_path` (string, optional): defaults to `~/.deepseek/mcp.json`.
  It is visible in `/config` and can be changed from the TUI. The new path is
  used immediately by `/mcp`, but rebuilding the model-visible MCP tool pool
  requires restarting the TUI.
- `notes_path` (string, optional): defaults to `~/.deepseek/notes.txt` and is used by the `note` tool.
- `memory_path` (string, optional): defaults to `~/.deepseek/memory.md`.
  Used by the user-memory feature when enabled — see
  [`MEMORY.md`](MEMORY.md) for the full feature surface (`# foo`
  composer prefix, `/memory` slash command, `remember` tool, opt-in
  toggle).
- `snapshots.*` (optional): side-git workspace snapshots for file rollback:
  - `[snapshots].enabled` (bool, default `true`)
  - `[snapshots].max_age_days` (int, default `7`)
  - snapshots live under `~/.deepseek/snapshots/<project_hash>/<worktree_hash>/.git` and never use the workspace's own `.git` directory
- `context.*` (optional): append-only Flash seam manager, currently opt-in.
  Thresholds use the active request input estimate, not lifetime summed API
  usage:
  - `[context].enabled` (bool, default `false`)
  - `[context].verbatim_window_turns` (int, default `16`)
  - `[context].l1_threshold` (int, default `192000`)
  - `[context].l2_threshold` (int, default `384000`)
  - `[context].l3_threshold` (int, default `576000`)
  - `[context].cycle_threshold` (int, default `768000`)
  - `[context].seam_model` (string, default `deepseek-v4-flash`)
- `retry.*` (optional): retry/backoff settings for API requests:
  - `[retry].enabled` (bool, default `true`)
  - `[retry].max_retries` (int, default `3`)
  - `[retry].initial_delay` (float seconds, default `1.0`)
  - `[retry].max_delay` (float seconds, default `60.0`)
  - `[retry].exponential_base` (float, default `2.0`)
- `capacity.*` (optional): runtime context-capacity controller. This is opt-in
  because its active interventions can rewrite the live transcript.
  - `[capacity].enabled` (bool, default `false`)
  - `[capacity].low_risk_max` (float, default `0.50`)
  - `[capacity].medium_risk_max` (float, default `0.62`)
  - `[capacity].severe_min_slack` (float, default `-0.25`)
  - `[capacity].severe_violation_ratio` (float, default `0.40`)
  - `[capacity].refresh_cooldown_turns` (int, default `6`)
  - `[capacity].replan_cooldown_turns` (int, default `5`)
  - `[capacity].max_replay_per_turn` (int, default `1`)
  - `[capacity].min_turns_before_guardrail` (int, default `4`)
  - `[capacity].profile_window` (int, default `8`)
  - `[capacity].deepseek_v3_2_chat_prior` (float, default `3.9`)
  - `[capacity].deepseek_v3_2_reasoner_prior` (float, default `4.1`)
  - `[capacity].deepseek_v4_pro_prior` (float, default `3.5`)
  - `[capacity].deepseek_v4_flash_prior` (float, default `4.2`)
  - `[capacity].fallback_default_prior` (float, default `3.8`)
- `tui.alternate_screen` (string, optional): `auto`, `always`, or `never`. `auto` disables the alternate screen in Zellij; `--no-alt-screen` forces inline mode. Set `never` or run with `--no-alt-screen` when you want real terminal scrollback.
- `tui.mouse_capture` (bool, optional, default `true` when the alternate screen is active): enable internal mouse scrolling, transcript selection, and right-click context actions. TUI-owned drag selection copies only user/assistant transcript text. Set this to `false` or run with `--no-mouse-capture` for raw terminal selection.
- `tui.terminal_probe_timeout_ms` (int, optional, default `500`): startup terminal-mode probe timeout in milliseconds. Values are clamped to `100..=5000`; timeout emits a warning and aborts startup instead of hanging indefinitely.
- `tui.osc8_links` (bool, optional, default `true`): emit OSC 8 escape sequences around URLs in transcript output so terminals that support them (iTerm2, Terminal.app 13+, Ghostty, Kitty, WezTerm, Alacritty, recent gnome-terminal/konsole) render them as Cmd+click hyperlinks. Terminals without OSC 8 support render the plain URL and ignore the escape. Set `false` for terminals that misrender the sequence; selection/clipboard output always strips the escapes.
- `hooks` (optional): lifecycle hooks configuration (see `config.example.toml`).
- `features.*` (optional): feature flag overrides (see below).

### Parsed but currently unused (reserved for future versions)

These keys are accepted by the config loader but not currently used by the interactive TUI or built-in tools:

- `tools_file`

## Feature Flags

Feature flags live under the `[features]` table and are merged across profiles.
Defaults are enabled for built-in tooling, so you only need to set entries you
want to force on or off.

```toml
[features]
shell_tool = true
subagents = true
web_search = true # enables canonical web.run plus the compatibility web_search alias
apply_patch = true
mcp = true
exec_policy = true
```

You can also override features for a single run:

- `deepseek-tui --enable web_search`
- `deepseek-tui --disable subagents`

Use `deepseek-tui features list` to inspect known flags and their effective state.

## Local Media Attachments

Use `@path/to/file` in the composer to add local text file or directory context
to the next message. Use `/attach <path>` for local image/video media paths, or
`Ctrl+V` to attach an image from the clipboard. DeepSeek's public Chat
Completions API currently accepts text message content, so media attachments are
sent as explicit local path references instead of native image/video payloads.
Attachment rows appear above the composer before submit; move to the start of
the composer, press `↑` to select an attachment row, then press `Backspace` or
`Delete` to remove it without editing the placeholder text by hand.

## Managed Configuration and Requirements

DeepSeek TUI supports a policy layering model:

1. user config + profile + env overrides
2. managed config (if present)
3. requirements validation (if present)

By default on Unix:
- managed config: `/etc/deepseek/managed_config.toml`
- requirements: `/etc/deepseek/requirements.toml`

Requirements file shape:

```toml
allowed_approval_policies = ["on-request", "untrusted", "never"]
allowed_sandbox_modes = ["read-only", "workspace-write"]
```

If configured values violate requirements, startup fails with a descriptive error.

See `docs/capacity_controller.md` for formulas, intervention behavior, and telemetry.

## Notes On `deepseek-tui doctor`

`deepseek-tui doctor` follows the same config resolution rules as the rest of the
TUI. That means `--config` / `DEEPSEEK_CONFIG_PATH` are respected, and MCP/skills
checks use the resolved `mcp_config_path` / `skills_dir` (including env overrides).

To bootstrap missing MCP/skills paths, run `deepseek-tui setup --all`. You can
also run `deepseek-tui setup --skills --local` to create a workspace-local
`./skills` dir.

`deepseek-tui doctor --json` prints a machine-readable report that skips the
live API connectivity probe. Top-level keys: `version`, `config_path`,
`config_present`, `workspace`, `api_key.source`, `base_url`,
`default_text_model`, `mcp`, `skills`, `tools`, `plugins`, `sandbox`,
`platform`, `api_connectivity`, `capability`. CI consumers should rely on `api_key.source`
(`env`/`config`/`missing`) rather than parsing the human-readable `doctor`
text.

The `capability` key contains per-provider capability info derived from
static knowledge (release docs, API guides) rather than live API probes.
Top-level sub-keys: `resolved_provider`, `resolved_model`, `context_window`,
`max_output`, `thinking_supported`, `cache_telemetry_supported`,
`request_payload_mode`, and `deprecation`. When the resolved model is a known
legacy alias (e.g. `deepseek-chat`, `deepseek-reasoner`), the `deprecation`
sub-object carries `alias`, `replacement`, and `notice` fields.

Use `capability.context_window` and `capability.max_output` for context-window
budgeting in CI scripts. Use `capability.thinking_supported` to decide whether
to configure reasoning effort. Use `capability.deprecation` to warn users about
legacy model aliases.

## Setup status, clean, and extension dirs

`deepseek-tui setup` accepts a few flags beyond the existing `--mcp`,
`--skills`, `--local`, `--all`, and `--force`:

- `--status` — print a compact one-screen status (api key, base URL, model,
  MCP/skills/tools/plugins counts, sandbox, `.env` presence). Read-only and
  network-free; safe to run in CI. If `.env` is missing and `.env.example` is
  present in the workspace, the status output points at `cp .env.example .env`.
- `--tools` — scaffold `~/.deepseek/tools/` with a `README.md` describing the
  self-describing frontmatter convention (`# name:` / `# description:` /
  `# usage:`) and an `example.sh` that follows it. The directory is
  intentionally not auto-loaded; wire individual scripts into the agent via
  MCP, hooks, or skills.
- `--plugins` — scaffold `~/.deepseek/plugins/` with a `README.md` and an
  `example/PLUGIN.md` placeholder using the same frontmatter shape as
  `SKILL.md`. Plugins are not loaded automatically either; reference them
  from a skill or MCP wrapper when you want them active.
- `--all` now scaffolds MCP + skills + tools + plugins together.
- `--clean` — list `~/.deepseek/sessions/checkpoints/latest.json` and
  `offline_queue.json` if they exist. Pass `--force` to actually remove them.
  This never touches real session history or the task queue.

`--status` and `--clean` are mutually exclusive with the scaffold flags.

## Why the engine strips XML/`[TOOL_CALL]` text

DeepSeek TUI sends and receives tool calls only over the API tool channel
(structured `tool_use` / `tool_call` items). The streaming loop in
`crates/tui/src/core/engine.rs` recognizes a fixed set of fake-wrapper start
markers — `[TOOL_CALL]`, `<deepseek:tool_call`, `<tool_call`, `<invoke `,
`<function_calls>` — and scrubs them from visible assistant text without ever
turning them into structured tool calls. When a wrapper is stripped, the loop
emits one compact `status` notice per turn so the user can see why their
visible text shrank. Treat any change that re-enables text-based tool
execution as a regression; the protocol-recovery tests in
`crates/tui/tests/protocol_recovery.rs` lock the contract.