dsh-blackhole

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A geodesic-traced Schwarzschild black hole floating inside DeepSeek Harness (DSH) — a persistent client plugin for the DSH web surface, ported from s0xDk/ghostty-blackhole (Ghostty custom shader, MIT). The black hole lives on a click-through WebGL2 overlay above the page: every near-field pixel integrates its own null geodesic through the Schwarzschild metric (Binet form a = -(3/2) h² x / r⁵), so the shadow, the accretion disk, the photon ring, and the gravitational lensing are all emergent from the ray tracing — nothing is painted on.

What it renders

• The shadow — rays under b_crit = (3√3/2) r_s spiral in and come back black.
• Accretion disk — thin Keplerian disk with a Shakura–Sunyaev temperature profile, relativistic Doppler shift and beaming (g = √(1 − 1.5 r_s/r)/(1 − β·k̂)); the far side arcs over and under the shadow (the Interstellar look).
• Photon ring — rays winding near the 1.5 r_s photon sphere.
• Gravitational lensing — with the optional Sky background on, escaped rays project onto a procedural starfield "sky" plane (browsers cannot sample page pixels into WebGL); the far field uses the analytic weak-field deflection with mild chromatic aberration. With it off (the default) the hole floats directly over the page: shadow, photon ring and accretion disk only, everything around stays transparent.
• Gravitational time dilation — the disk pattern winds down as the hole grows heavier.

Modes

15 disk presets from the upstream tuner + ghostty-blackhole-main, rigid-body disk spin, follow-pointer with position easing, an Auto look mode that randomly changes the disk appearance every 5–20 s (random presets or fully random parameters, with a smooth transition), and a full settings page (设置 → Blackhole) with live status (mode / level / FPS / shader errors), a Sky background toggle, independent hole/sky opacity sliders, and a four-language UI (简体中文 / 繁體中文 / 日本語 / English). The bottom 10 % work area is never covered; all state is in-memory only.

Usage

The effect starts automatically with every dsh web session — no action needed after install. Defaults: Context mode (the hole tracks the current conversation and hides when the session is blank), sky background off, bottom 10 % of the page protected.

Open 设置 → Blackhole to control it:

• Mode — Demo tour (42 s preset showcase) · Pomodoro (55/5 + idle fade) · Context (conversation size) · Manual (fixed level) · Off.
• Preset — one of 15 disk looks, or enable Auto look to rotate them randomly every 5–20 s.
• Size & motion — hole radius, max fill area, lens depth, drift speed, spin speed (rigid disk + photon-ring rotation), work area, follow pointer.
• Disk — temperature, gain, opacity, streak contrast, starfield gain, exposure, time-dilation floor.
• Background — the lensed starfield sky (off by default).
• Render — quality (geodesic steps), independent hole/sky opacity.
• Language — 简体中文 / 繁體中文 / 日本語 / English.

Install (persistent, auto-loads on every dsh web start)

DSH composes its web profile from bundle patch layers plus your own layer at $DSH_HOME/profiles/web/cordis.patch.yml. Installing a client plugin means adding a package and one row:

# 1. Clone into the profile tree
New-Item -ItemType Directory -Force "$env:USERPROFILE\.dsh\profiles\web\packages"
git clone https://github.com/<you>/dsh-blackhole "$env:USERPROFILE\.dsh\profiles\web\packages\dsh-blackhole"

# 2. Link it into the profile (records the dependency in package.json)
dsh plugin --profile web add "$env:USERPROFILE\.dsh\profiles\web\packages\dsh-blackhole"

# 3. Host-side resolution anchor (bare package name is resolved from the
#    hoisted node_modules; pnpm links local dirs into web/node_modules only)
New-Item -ItemType Junction `
  -Path "$env:USERPROFILE\.dsh\profiles\node_modules\dsh-blackhole" `
  -Target "$env:USERPROFILE\.dsh\profiles\web\packages\dsh-blackhole"

# 4. Add the row: append install/cordis.patch.example.yml to
#    $DSH_HOME/profiles/web/cordis.patch.yml

Restart dsh web. On every start, dsh-client-modules scans the row's dsh.client declaration into window.__DSH_BOOT__ and serves the bundle from /plugins/dsh-blackhole/client.js — no session action needed.

The junction in step 3 is the one hand-maintained piece: re-create it after a dsh plugin add/remove of another package prunes the hoisted node_modules.

Uninstall

Delete the blackhole row from cordis.patch.yml, then dsh plugin --profile web remove dsh-blackhole.

How it works

• package.json — the dsh.client declaration (platform: web, immediately: true) and the ./client export the module system scans.
• lib/index.js — host half: a no-op apply so the host Loader row mounts.
• lib/client.js — the browser bundle: a classic script registering a window.__ModuleLoader__.load({ id, factory }) factory whose exports are the Cordis plugin. It requires only the seeded react module and — like every shipped client plugin — declares inject: ["slots"], because the client kernel exposes a service only when the plugin's inject lists it (ctx.get("slots") is undefined otherwise).
• The plugin registers three slots: shell.overlay (fullscreen click-through WebGL2 canvas, order −100), settings.section (the control panel), and conversation.session.header.utilities (a null-rendering probe that reads the conversation snapshot's blank / nodes.length leaves for Context mode).
• GLSL ES 3.00 port of blackhole.glsl with two deliberate changes: gl_FragCoord.y is converted to Ghostty's top-down convention, and the struct-returning ternary is written as if/else because ANGLE (D3D11) rejects ?: on structures even in ESSL 3.00.

Credits & license

• Shader physics and demo tour: s0xDk/ghostty-blackhole (MIT, © 2026 s13k), after Eric Bruneton's black hole shader.
• Preset values and follow-pointer idea: XboxNahida/ghostty-blackhole-main (MIT).
• Mode-semantics cross-check: 962412311/win-ghostty-blackhole.

MIT — see LICENSE.