decision-lens by theonly1me: Claude Code mod code and design

What it does

Draws a pane, the status line, toasts
Adds /why
Watches tool calls and can refuse them
Hooks prompt.compose, session.start, turn.complete, turn.start and 1 more
Keeps its own state between turns

Good points

No network calls
Starts no processes
Written in TypeScript
Handles errors

Code to start from

Two kinds: a starter modscode writes from the design above, and the lines of the mod's own code that draw it.

Starter (register.tsx)

import type { Register } from 'claude-code'

// Drawn like decision-lens by Atchyut (pane, status, toast), as modscode read it from the mod's code:
// https://modscode.com/gallery/theonly1me-decision-lens/
// Written by modscode from that reading, not copied from the mod: use it as you like.
// Each value below stands for one the mod works out at run time; put in your own.
export const register: Register = on => {
  // the pane: open it with $.ui.open({ id: 'my-pane', title: "Decision Lens" })
  on('ui.render', { component: 'Pane', requestId: 'my-pane' }, async ($, e) => {
    const { Box, Text, Button } = $.ui.resolve(e)
    const position = '…'
    const ruleCount = '…'
    const hint = '…'
    const prompt = '…'
    const message = '…'
    const number = '…'
    const title = '…'
    const confidenceGlyph = '…'
    const label = '…'
    const text = '…'
    const text2 = '…'
    const text3 = '…'
    const alternative = '…'
    const unquoted = '…'
    const explanation = '…'
    const confidenceGlyph2 = '…'
    const text4 = '…'
    const text5 = '…'
    const text6 = '…'
    const explanation2 = '…'
    const confidenceGlyph3 = '…'
    const text7 = '…'
    const text8 = '…'
    const text9 = '…'
    const explanation3 = '…'
    return (
      <Box flexDirection="column">
        <Box flexDirection="column" marginBottom={1}>
          <Text>
            <Text bold color="#a78bfa">
              Decision Lens
            </Text>
            <Text dimColor>
              {position}
            </Text>
          </Text>
          <Box flexDirection="row" flexWrap="wrap" columnGap={2}>
            <Button plain hotkey="p" label="◀ Earlier turn" />
            <Button plain hotkey="n" label="Later turn ▶" />
            <Button plain hotkey="d" label="Decisions" />
            <Button plain hotkey="r" label={`Rules (${ruleCount})`} />
            <Button plain hotkey="x" role="dismiss" label="Close" />
          </Box>
          <Text color="#8b93a1">
            {hint}
          </Text>
        </Box>
        <Text italic dimColor>
          {`“${prompt}”`}
        </Text>
        <Text dimColor>
          {message}
        </Text>
        <Box flexDirection="column" borderStyle="round" borderColor="#a78bfa" paddingX={1}>
          <Box flexDirection="row" justifyContent="space-between" columnGap={1}>
            <Button plain hotkey={`${number}`} label={`◆ ${title}`} />
            <Text color="#8b93a1">
              {confidenceGlyph}
            </Text>
          </Box>
          <Text>
            <Text bold>
              {`${label}  `}
            </Text>
            {text}
          </Text>
          <Text>
            <Text bold>
              {`${label}  `}
            </Text>
            {text2}
          </Text>
          <Text>
            <Text bold>
              {`${label}  `}
            </Text>
            {text3}
          </Text>
          <Text dimColor>
            {`◇ ${alternative}`}
          </Text>
          <Text dimColor>
            {`◇ ${alternative}`}
          </Text>
          <Text dimColor>
            {`◇ ${alternative}`}
          </Text>
          <Text italic dimColor>
            {`“${unquoted}”`}
          </Text>
          <Text color="#a78bfa">
            Asking Claude…
          </Text>
          <Text>
            {explanation}
          </Text>
          <Box flexDirection="row" flexWrap="wrap" columnGap={2} marginTop={1}>
            <Text color="#34d399">
              ✓ keep rule saved
            </Text>
            <Text color="#fb7185">
              ✓ avoid rule saved
            </Text>
            <Button plain label="? Ask why" />
          </Box>
        </Box>
        <Box flexDirection="column" borderStyle="round" borderColor="#a78bfa" paddingX={1}>
          <Box flexDirection="row" justifyContent="space-between" columnGap={1}>
            <Button plain hotkey={`${number}`} label={`◆ ${title}`} />
            <Text color="#8b93a1">
              {confidenceGlyph2}
            </Text>
          </Box>
          <Text>
            <Text bold>
              {`${label}  `}
            </Text>
            {text4}
          </Text>
          <Text>
            <Text bold>
              {`${label}  `}
            </Text>
            {text5}
          </Text>
          <Text>
            <Text bold>
              {`${label}  `}
            </Text>
            {text6}
          </Text>
          <Text dimColor>
            {`◇ ${alternative}`}
          </Text>
          <Text dimColor>
            {`◇ ${alternative}`}
          </Text>
          <Text dimColor>
            {`◇ ${alternative}`}
          </Text>
          <Text italic dimColor>
            {`“${unquoted}”`}
          </Text>
          <Text color="#a78bfa">
            Asking Claude…
          </Text>
          <Text>
            {explanation2}
          </Text>
          <Box flexDirection="row" flexWrap="wrap" columnGap={2} marginTop={1}>
            <Text color="#34d399">
              ✓ keep rule saved
            </Text>
            <Text color="#fb7185">
              ✓ avoid rule saved
            </Text>
            <Button plain label="? Ask why" />
          </Box>
        </Box>
        <Box flexDirection="column" borderStyle="round" borderColor="#a78bfa" paddingX={1}>
          <Box flexDirection="row" justifyContent="space-between" columnGap={1}>
            <Button plain hotkey={`${number}`} label={`◆ ${title}`} />
            <Text color="#8b93a1">
              {confidenceGlyph3}
            </Text>
          </Box>
          <Text>
            <Text bold>
              {`${label}  `}
            </Text>
            {text7}
          </Text>
          <Text>
            <Text bold>
              {`${label}  `}
            </Text>
            {text8}
          </Text>
          <Text>
            <Text bold>
              {`${label}  `}
            </Text>
            {text9}
          </Text>
          <Text dimColor>
            {`◇ ${alternative}`}
          </Text>
          <Text dimColor>
            {`◇ ${alternative}`}
          </Text>
          <Text dimColor>
            {`◇ ${alternative}`}
          </Text>
          <Text italic dimColor>
            {`“${unquoted}”`}
          </Text>
          <Text color="#a78bfa">
            Asking Claude…
          </Text>
          <Text>
            {explanation3}
          </Text>
          <Box flexDirection="row" flexWrap="wrap" columnGap={2} marginTop={1}>
            <Text color="#34d399">
              ✓ keep rule saved
            </Text>
            <Text color="#fb7185">
              ✓ avoid rule saved
            </Text>
            <Button plain label="? Ask why" />
          </Box>
        </Box>
      </Box>
    )
  })

  on('session.start', async ($, e, next) => {
    await $.ui.status(`◆ reading the decisions in this turn`)
    await $.ui.toast(`Keep rule saved. Claude reads it from the next request.`)
    return next(e)
  })
}

The mod's own code

Shown under the mod's licence (MIT); its text is below. Keep the notice if you copy these lines.

plugins/decision-lens/hooks/pane.tsx lines 116–156 · Pane

plugins/decision-lens/hooks/pane.tsx:116

  on('ui.render', { component: 'Pane', requestId: PANE_ID }, async ($, e) => {
    const elements = $.ui.resolve(e)
    const { Box, Text } = elements
    const view = lensView()
    const turn = selectedTurn()
    const act = (action: PaneAction) => {
      perform($, { action }).catch(noop)
    }
    const hasCards = view.tab === 'decisions' && turn?.status === 'ready' && turn.decisions.length > 0
    const position = view.tab === 'decisions' && turn ? `  turn ${view.turns.indexOf(turn) + 1} of ${view.turns.length}` : ''
    const message = view.tab === 'decisions' ? turnMessage({ turn, isAnalysisOn: view.isAnalysisOn }) : undefined
    const header = headerTree({
      elements,
      act,
      tab: view.tab,
      position,
      ruleCount: view.rules.length,
      hint: hintText({ isFocused: e.props.isFocused, tab: view.tab }),
    })
    if (view.tab === 'rules') {
      return (
        <Box flexDirection="column">
          {header}
          <Text dimColor>Claude reads these rules in every session: project rules here, global rules everywhere.</Text>
          {view.rules.length === 0 && <Text dimColor>No rules yet. Press k or a on a decision card, or type /why keep 1.</Text>}
          {view.rules.map((rule, index) => ruleTree({ elements, act, rule, number: index + 1 }))}
        </Box>
      )
    }
    return (
      <Box flexDirection="column">
        {header}
        {turn && <Text italic dimColor>{`“${turn.prompt}”`}</Text>}
        {message !== undefined && <Text dimColor>{message}</Text>}
        {hasCards &&
          turn.decisions.map((decision, index) =>
            cardTree({ elements, act, turn, decision, number: index + 1, isSelected: index + 1 === view.selectedNumber, rules: view.rules }),
          )}
      </Box>
    )
  })

plugins/decision-lens/hooks/lens/panel.tsx lines 30–56 · Pane

plugins/decision-lens/hooks/lens/panel.tsx:30

export function headerTree(options: {
  elements: ElementTable
  act: Act
  tab: LensTab
  position: string
  ruleCount: number
  hint: string
}): RenderElement {
  const { Box, Text, Button } = options.elements
  const { act, tab } = options
  return (
    <Box flexDirection="column" marginBottom={1}>
      <Text>
        <Text bold color={COLORS.accent}>Decision Lens</Text>
        <Text dimColor>{options.position}</Text>
      </Text>
      <Box flexDirection="row" flexWrap="wrap" columnGap={2}>
        <Button key="previous" plain hotkey="p" label="◀ Earlier turn" onPress={() => act({ kind: 'turn', step: -1 })} />
        <Button key="next" plain hotkey="n" label="Later turn ▶" onPress={() => act({ kind: 'turn', step: 1 })} />
        <Button key="tab-decisions" plain hotkey="d" label="Decisions" dimColor={tab !== 'decisions'} onPress={() => act({ kind: 'tab', tab: 'decisions' })} />
        <Button key="tab-rules" plain hotkey="r" label={`Rules (${options.ruleCount})`} dimColor={tab !== 'rules'} onPress={() => act({ kind: 'tab', tab: 'rules' })} />
        <Button key="close" plain hotkey="x" role="dismiss" label="Close" onPress={() => act({ kind: 'close' })} />
      </Box>
      <Text color={COLORS.muted}>{options.hint}</Text>
    </Box>
  )
}

plugins/decision-lens/hooks/lens/panel.tsx lines 121–139 · Pane

plugins/decision-lens/hooks/lens/panel.tsx:121

export function ruleTree(options: { elements: ElementTable; act: Act; rule: Rule; number: number }): RenderElement {
  const { Box, Text, Button } = options.elements
  const { act, rule } = options
  const isKeep = rule.kind === 'keep'
  return (
    <Box key={`rule-${rule.id}`} flexDirection="column" marginBottom={1}>
      <Text>
        <Text color={COLORS.muted}>{`${options.number}. `}</Text>
        <Text color={isKeep ? COLORS.keep : COLORS.avoid}>{isKeep ? '▲ keep  ' : '▼ avoid '}</Text>
        {rule.text}
      </Text>
      <Box flexDirection="row" columnGap={2} paddingLeft={3}>
        <Text dimColor>{rule.scope === 'project' ? 'this project' : 'every project'}</Text>
        <Button key={`scope-${rule.id}`} label={rule.scope === 'project' ? 'Make global' : 'This project only'} onPress={() => act({ kind: 'scope', ruleId: rule.id })} />
        <Button key={`remove-${rule.id}`} label="Remove" onPress={() => act({ kind: 'remove', ruleId: rule.id })} />
      </Box>
    </Box>
  )
}

plugins/decision-lens/hooks/lens/panel.tsx lines 87–119 · Pane

plugins/decision-lens/hooks/lens/panel.tsx:87

export function cardTree(options: {
  elements: ElementTable
  act: Act
  turn: LensTurn
  decision: Decision
  number: number
  isSelected: boolean
  rules: readonly Rule[]
}): RenderElement {
  const { Box, Text, Button } = options.elements
  const { decision, number, isSelected } = options
  return (
    <Box key={`decision-${decision.id}`} flexDirection="column" borderStyle="round" borderColor={isSelected ? COLORS.accent : COLORS.frame} paddingX={1}>
      <Box flexDirection="row" justifyContent="space-between" columnGap={1}>
        <Button key={`card-${number}`} plain hotkey={String(number)} {...(number === 1 ? ({ autoFocus: true } as const) : {})} label={`◆ ${decision.title}`} onPress={() => options.act({ kind: 'select', number })} />
        <Text color={COLORS.muted}>{confidenceGlyph(decision.confidence)}</Text>
      </Box>
      {decisionBody(decision).map(part => (
        <Text>
          <Text bold>{`${part.label}  `}</Text>
          {part.text}
        </Text>
      ))}
      {decision.alternatives.map(alternative => (
        <Text dimColor>{`◇ ${alternative}`}</Text>
      ))}
      {decision.evidence !== '' && <Text italic dimColor>{`“${unquoted(decision.evidence)}”`}</Text>}
      {decision.isAsking && <Text color={COLORS.accent}>Asking Claude…</Text>}
      {decision.explanation !== '' && <Text>{decision.explanation}</Text>}
      {steerButtons(options)}
    </Box>
  )
}

plugins/decision-lens/hooks/lens/panel.tsx lines 58–85 · Pane

plugins/decision-lens/hooks/lens/panel.tsx:58

function steerButtons(options: {
  elements: ElementTable
  act: Act
  turn: LensTurn
  decision: Decision
  rules: readonly Rule[]
  isSelected: boolean
}): RenderElement {
  const { Box, Text, Button } = options.elements
  const { act, decision, isSelected } = options
  const ids = { turnId: options.turn.id, decisionId: decision.id }
  const keyed = (key: string) => (isSelected ? { hotkey: key } : {})
  return (
    <Box flexDirection="row" flexWrap="wrap" columnGap={2} marginTop={1}>
      {hasRule({ rules: options.rules, text: decision.keep }) ? (
        <Text color={COLORS.keep}>✓ keep rule saved</Text>
      ) : (
        <Button key={`keep-${decision.id}`} plain {...keyed('k')} dimColor={!isSelected} label="▲ Keep doing this" onPress={() => act({ kind: 'keep', ...ids })} />
      )}
      {hasRule({ rules: options.rules, text: decision.avoid }) ? (
        <Text color={COLORS.avoid}>✓ avoid rule saved</Text>
      ) : (
        <Button key={`avoid-${decision.id}`} plain {...keyed('a')} dimColor={!isSelected} label="▼ Don't do this" onPress={() => act({ kind: 'avoid', ...ids })} />
      )}
      <Button key={`why-${decision.id}`} plain {...keyed('w')} dimColor={!isSelected} label="? Ask why" onPress={() => act({ kind: 'ask', ...ids })} />
    </Box>
  )
}

Licence text (MIT)

MIT License

Copyright (c) 2026 Atchyut

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

What its code calls

drives Claudetool callsremembers

The design, read from code

Claude — Code

Keep rule saved. Claude reads it from the next request.

Ask Claude…

◆ reading the decisions in this turn

Decision Lens

Decision LensClose

p ◀ Earlier turnn Later turn ▶d Decisionsr Rules (3)x Close

Avoid

“Did”Avoid

3 ◆ Fix login●

build Whybuild Whybuild Why◇ Why◇ Why◇ Why“Close”Asking Claude…Close

✓ keep rule saved✓ avoid rule saved? Ask why

3 ◆ Fix login●

build Whybuild Whybuild Why◇ Why◇ Why◇ Why“Close”Asking Claude…Close

✓ keep rule saved✓ avoid rule saved? Ask why

3 ◆ Fix login●

build Whybuild Whybuild Why◇ Why◇ Why◇ Why“Close”Asking Claude…Close

✓ keep rule saved✓ avoid rule saved? Ask why

Drawn from the mod's source at the commit read, not from a run: a list is drawn three times, a condition takes its first branch that draws in the desktop app, and a value only the run time knows is shown as a made-up sample (dotted underline) or left out. Colours and type are this site's.

What its code shows

Read from the source at commit 6d69bf8871bb on 2026-10-06. The first group decides whether a mod is listed; the rest is for you to weigh. A later commit is not read until the next crawl.

Decides the listing: code you can check
Entry read	Every module hooks/hooks.json names was read.plugins/decision-lens/hooks/register.ts
Parses	Every file parses as TypeScript or JavaScript.14 files parsed
All its code is in the mod	Every import is a file of the mod or the engine's own module; no packages, no require.all its code is in the mod
Readable	No minified lines, no eval or new Function, no import of a computed path, no encoded blobs.no minified code, no eval, no encoded blobs
Calls in the open	Network and programs are reached as $.http.fetch and $.process.run in place, never passed around.every call outside goes through $ in the open
For you to weigh before installing
Where it draws	The terminal, the desktop app, both, or nothing (hooks only: a guard or a prompt rewriter), as its code says. Shown, never a reason to leave a mod out.draws in the terminal and the desktop app, the same in both
Install line	Whether its repository's own .claude-plugin/marketplace.json lists it, so it installs from that marketplace with the lines on its page.listed in its repository's .claude-plugin/marketplace.json: installs from there
Programs on Windows	Whether every program it starts through $.process exists on Windows (tail, date, open, osascript, /usr/… do not).runs no program a Windows PC lacks
Network	Whether every fetch names its https host in the code.no network
Programs	Whether every program it starts is named in the code and is not a shell, an interpreter or a network tool.starts no programs
Reads and sends	Whether it both reads files or environment variables and reaches the network.reaches no network
Keys in the source	Whether the source holds what looks like an API key or a private key.no keys in the source
Licence	An open licence (MIT, Apache-2.0, BSD, ISC, Unlicense, 0BSD, CC0) with its text lets modscode show its code; otherwise the code is linked.MIT

This is a reading of the code text, not a security review: it does not run the mod, and it cannot see what a program the mod starts does. The check before installing is yours. How mods are chosen

Install it

Check it yourself before you install it. Mods run unsandboxed, with your permissions, and modscode does not vouch for what this code does. Read the code below (or run claude plugin validate . in its folder), weigh what it reaches, and install the commit you read.

Its repository is its marketplace. Add that marketplace (in the terminal with these commands, or in the desktop app's plugin settings) and install the mod from it:

/plugin marketplace add theonly1me/claude-code-mods

/plugin install decision-lens@claude-code-mods

This installs the marketplace's latest commit, which may not be the one read here (6d69bf8871bb). Compare them before you install.

Ask Claude about it

With the modscode connector added, Claude can read this design, what its code reaches and its code, and build on them. Ask it like this:

Read the modscode design "theonly1me-decision-lens" with its code and make me a pane like it

Search them from Claude: the MCP connector

decision-lens

What it does

Good points

Code to start from

Starter (register.tsx)

The mod's own code

What its code calls

The design, read from code

What its code shows

Install it

Ask Claude about it

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