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Merged
mrubens merged 9 commits into from
Oct 23, 2025
Merged

feat: add token-budget based file reading with intelligent preview #8789

mrubens merged 9 commits into from
Oct 23, 2025

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@daniel-lxs
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@daniel-lxs daniel-lxs commented Oct 23, 2025 •
edited by ellipsis-dev bot
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Problem

Files can fill the entire context window, and tiktoken crashes with RuntimeError: unreachable on files >5MB.

Solution

Token-budget based file reading with multi-layer protection against context overflow and tokenizer crashes.

How It Works

File Read Request
       ↓
Check file size
       ↓
   < 100KB? → Read normally (fast path)
       ↓
   > 5MB? → Preview first 100KB (crash prevention)
       ↓
Count tokens → Within budget? → Full content
                     ↓
                Exceeds budget? → Truncate to fit

Implementation

Layer 1: Fast Path (< 100KB)

  • Skip validation for small files - zero overhead ⚡

Layer 2: Token Validation (100KB - 5MB)

  • Dynamic budget: (contextWindow - currentTokens) * 0.6
  • Real token counting, smart truncation if needed 🎯

Layer 3: Preview Mode (> 5MB)

  • Return 100KB preview to prevent crashes
  • Suggests using line_range for targeted reading 👁️

Layer 4: Error Recovery

  • Catch tokenizer unreachable errors gracefully
  • Fallback to 100KB preview instead of crashing 🛡️

Benefits

✅ Dynamic budget based on actual context (no magic numbers)
✅ Real token counting using existing tokenizer
✅ 100KB previews for large files
✅ Graceful error handling prevents conversation crashes
✅ Simple (~160 lines) vs complex heuristics
✅ 17 comprehensive tests covering all scenarios

Testing

All 17 tests passing: fast path, budget validation, preview mode, error recovery, edge cases, unicode support.

Related

Closes #6667

Important

Introduces token-budget based file reading in readFileTool.ts to handle large files efficiently, with new functions for budget validation and content truncation, and comprehensive tests.

  • Behavior:
    • Implements token-budget based file reading in readFileTool.ts to prevent context overflow and tokenizer crashes.
    • Introduces validateFileTokenBudget and truncateFileContent in fileTokenBudget.ts for handling large files.
    • Handles files <100KB normally, previews first 100KB for files >5MB, and truncates content if it exceeds token budget.
  • Testing:
    • Adds fileTokenBudget.spec.ts with 17 tests covering scenarios like small files, large files, budget validation, and error handling.
    • Updates line-counter.spec.ts to test line and token counting with error handling.
  • Misc:
    • Updates line-counter.ts to include token estimation alongside line counting.
    • Modifies readFileTool.spec.ts to test new file reading behavior.

This description was created by Ellipsis for 169fb35. You can customize this summary. It will automatically update as commits are pushed.

@daniel-lxs
feat: add token-budget based file reading with intelligent preview
f379ae9 
Implements a simple, token-budget based file reading system that prevents
context window overflow and tokenizer crashes.

Problem:
- Files could fill entire context window causing issues
- tiktoken crashes with 'unreachable' error on files >5MB
- PR #6667's approach was too complex with magic numbers

Solution - Multi-Layer Defense:
1. Fast path: Files <100KB skip validation (no overhead)
2. Token validation: 100KB-5MB files use real token counting
   - Budget: (contextWindow - currentTokens) * 0.6
   - Smart truncation if exceeds budget
3. Preview mode: Files >5MB get 100KB preview (prevents crashes)
4. Error recovery: Catch tokenizer 'unreachable' errors gracefully

Key Features:
- No magic numbers - dynamic based on actual context
- Real token counting using existing tokenizer
- 100KB previews for large files (perfect size for structure visibility)
- Graceful error handling prevents conversation crashes
- Simple implementation (~160 lines vs complex heuristics)

Testing:
- 17 comprehensive tests covering all scenarios
- All tests passing including edge cases and error conditions

Files:
- src/core/tools/helpers/fileTokenBudget.ts: Core validation logic
- src/core/tools/helpers/__tests__/fileTokenBudget.spec.ts: Test suite
- src/core/tools/readFileTool.ts: Integration into read file tool
@daniel-lxs daniel-lxs requested review from cte, jr and mrubens as code owners October 23, 2025 14:15
@dosubot dosubot bot added size:XL This PR changes 500-999 lines, ignoring generated files. Enhancement New feature or request labels Oct 23, 2025
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roomote bot commented Oct 23, 2025 •
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Starting my review of this PR—comments incoming soon! 🚀

Follow Along on Roo Code Cloud

Issues to Address

All previously flagged issues have been resolved:

  • The lines attribute shows totalLines from the original file even after content is truncated (see inline comment on readFileTool.ts:619)
  • Empty lines are being filtered out when counting displayed lines, causing incorrect line count in the lines attribute (see inline comment on readFileTool.ts:620-621)
  • Line counting logic has off-by-one error for files ending with newline characters (see inline comment on readFileTool.ts:620)

Latest Review: No new issues found. All previous concerns have been properly addressed.

@hannesrudolph hannesrudolph added the Issue/PR - Triage New issue. Needs quick review to confirm validity and assign labels. label Oct 23, 2025
@daniel-lxs
feat: make preview respect token budget
f008a3d 
Improvements:
- Preview files (>5MB) now use token counting to respect budget
- Read only 100KB preview initially, then validate with tokenizer
- If preview exceeds budget, truncate accordingly
- Better error handling with conservative character-based estimation
- All 17 tests passing
roomote[bot]
roomote bot reviewed Oct 23, 2025
View reviewed changes
@daniel-lxs
fix: add missing getTokenUsage mock and update test expectations
5656afa 
- Added getTokenUsage mock to createMockCline for readFileTool tests
- Added contextWindow to model info mock
- Updated fileTokenBudget test expectations for error handling
- All 59 tests now passing (42 readFileTool + 17 fileTokenBudget)
@daniel-lxs
fix(read_file): set lines attribute to displayed line count after tru…
e68a5d6 
…ncation

- Previously used original file totalLines, causing mismatch after truncation
- Now computes displayedLines from truncated content and sets lines="1-N"
- Prevents LLM referencing non-existent line numbers
- All tests passing (59/59)
@daniel-lxs daniel-lxs moved this from Triage to PR [Needs Review] in Roo Code Roadmap Oct 23, 2025
roomote[bot]
roomote bot reviewed Oct 23, 2025
View reviewed changes
@daniel-lxs
fix(read_file): count empty lines in displayed line range after trunc…
f9ede9a 
…ation

- Count all lines (including empty) when computing lines="1-N"
- Prevents under-reporting when truncated preview contains blank lines
- Tests remain green (42/42 readFileTool, 17/17 fileTokenBudget)
@RooCodeInc RooCodeInc deleted a comment from roomote bot Oct 23, 2025
@hannesrudolph hannesrudolph added PR - Needs Review and removed Issue/PR - Triage New issue. Needs quick review to confirm validity and assign labels. labels Oct 23, 2025
@dosubot dosubot bot added the lgtm This PR has been approved by a maintainer label Oct 23, 2025
@daniel-lxs
feat: integrate streaming token counter for efficient budget validation
64b096b 
Integrated countFileLinesAndTokens into validateFileTokenBudget:
- Streams file once with chunked token estimation (256-line chunks)
- Early exits when budget exceeded (saves I/O and memory)
- Preserves all existing safety checks:
  - Fast path for <100KB files
  - Preview mode for >5MB files
  - Error handling for tokenizer crashes
  - Fallback to full read if streaming fails

Benefits:
- Single file pass with early exit vs full read + tokenize
- Prevents loading large files into memory unnecessarily
- Conservative fallback on tokenizer errors (2 chars = 1 token)
- All existing tests passing (59/59)

Files:
- src/integrations/misc/line-counter.ts: Added countFileLinesAndTokens()
- src/core/tools/helpers/fileTokenBudget.ts: Integrated streaming
- src/integrations/misc/__tests__/line-counter.spec.ts: Basic tests
ellipsis-dev[bot]
ellipsis-dev bot reviewed Oct 23, 2025
View reviewed changes
roomote[bot]
roomote bot reviewed Oct 23, 2025
View reviewed changes
@daniel-lxs
fix: correct line count for trailing newlines and fix line-counter tests
169fb35 
Two fixes:
1. Line counting off-by-one: Files ending with \n now count correctly
   - "line1\nline2\n" now correctly shows lines="1-2" not lines="1-3"
   - Consistent with countFileLines() behavior
   - Prevents LLM confusion about line numbers

2. Fixed line-counter.spec.ts mocking:
   - Use proper Readable stream instead of mock object
   - Properly mock fs.createReadStream with stream interface
   - All 63 tests passing (42 readFileTool + 17 fileTokenBudget + 4 line-counter)

Files changed:
- src/core/tools/readFileTool.ts: Handle trailing newline in line count
- src/integrations/misc/__tests__/line-counter.spec.ts: Fix stream mocking
@daniel-lxs @ellipsis-dev
Update src/core/tools/readFileTool.ts
b6b7587 
Co-authored-by: ellipsis-dev[bot] <65095814+ellipsis-dev[bot]@users.noreply.github.com>
@mrubens mrubens merged commit 93c13e2 into main Oct 23, 2025
9 checks passed
@github-project-automation github-project-automation bot moved this from New to Done in Roo Code Roadmap Oct 23, 2025
@github-project-automation github-project-automation bot moved this from PR [Needs Review] to Done in Roo Code Roadmap Oct 23, 2025
@mrubens mrubens deleted the feat/token-budget-file-reading branch October 23, 2025 19:35
@daniel-lxs daniel-lxs mentioned this pull request Oct 23, 2025
Closed
mini2s added a commit to zgsm-ai/costrict that referenced this pull request Oct 24, 2025
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Roo to main (#580)
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* fix: skip flaky Windows test in custom-system-prompt.spec.ts (RooCodeInc#8023)

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* Release: v1.76.0 (RooCodeInc#8030)

* Types 1.77.0 (RooCodeInc#8031)

* feat(web): update homepage headline and tagline for remote control capabilities (RooCodeInc#7911)

* Merge remote-tracking branch 'upstream/main' into roo-to-main

* ux: Responsive Auto-Approve (RooCodeInc#8032)

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* feat(cloud): Add telemetry retry queue for network resilience (RooCodeInc#7597)

* feat(cloud): Add telemetry retry queue for network resilience

- Implement RetryQueue class with workspace-scoped persistence
- Queue failed telemetry events for automatic retry
- Retry events every 60 seconds with fresh auth tokens
- FIFO eviction when queue reaches 100 events
- Persist queue across VS Code restarts

This ensures telemetry data isn't lost during network failures or temporary server issues.
Migrated from RooCodeInc/Roo-Code-Cloud#744

* fix: address PR review feedback for retry queue

- Fix retry order to use consistent FIFO processing
- Add retry limit enforcement with max retries check
- Add configurable request timeout (default 30s)
- Add comprehensive tests for retryAll() method
- Add request-max-retries-exceeded event
- Fix timeout test to avoid timing issues

* fix: resolve TypeScript errors in RetryQueue tests

* fix(cloud): Address PR feedback for telemetry retry queue

- Handle HTTP error status codes (500s, 401/403, 429) as failures that trigger retry
- Remove queuing of backfill operations since they're user-initiated
- Fix race condition in concurrent retry processing with isProcessing flag
- Add specialized retry logic for 429 with Retry-After header support
- Clean up unnecessary comments
- Add comprehensive tests for new status code handling
- Add temporary debug logs with emojis for testing

* refactor: address PR feedback for telemetry retry queue

- Remove unused X-Organization-Id header from auth header provider
- Simplify enqueue() API by removing operation parameter
- Fix error retry logic: only retry 5xx, 429, and network failures
- Stop retrying 4xx client errors (400, 401, 403, 404, 422)
- Implement queue-wide pause for 429 rate limiting
- Add auth state management integration:
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  - Clear queue on logout or user change
  - Preserve queue when same user logs back in
- Remove debug comments
- Fix ESLint no-case-declarations error with proper block scope
- Update tests for all new behaviors

* Docs: Overhaul README (RooCodeInc#8005)

* docs: overhaul README for clarity and impact

* fix: update badge links and styles in README for improved visibility

* docs(README): stronger CTAs for Discord/Reddit; restore Modes/Roles incl. cloud agents

* docs(readme): add support CTA; refine modes section; clarify custom modes wording

- add centered help/links CTA under badges: [README.md](README.md:8-10)
- expand feature list to explicitly include modes: [README.md](README.md:45)
- rename section header “Modes and Roles” → “Modes”: [README.md](README.md:52)
- update wording to “Custom Modes: build specialized modes for your team or workflow”: [README.md](README.md:60)

* docs: implement @jdilla1277 suggestions for English README

- Updated header to "Your AI-Powered Dev Team, Right in Your Editor" (removed Cline reference)
- Changed line 44 to "Generate Code from natural language descriptions and specs" for better SEO
- Removed "not the other way around" phrase from line 54
- Replaced "Cloud Agents" with "Roomote Control" on line 61

As requested by @hannesrudolph, these changes are only applied to the English README.

* docs: clarify Roomote Control description and update related links in README

* Reworked the contributor list. Made translastion corrections.

---------

Co-authored-by: Roo Code <[email protected]>

* Add organizationFeaturesSchema with roomoteControlEnabled (RooCodeInc#8085)

feat: add organizationFeaturesSchema with roomoteControlEnabled

- Add organizationFeaturesSchema with optional roomoteControlEnabled boolean
- Integrate features property into organizationSettingsSchema as optional
- Add comprehensive tests for new schema validation
- Maintain backward compatibility with existing organization settings

Co-authored-by: Roo Code <[email protected]>

* Release: v1.78.0 (RooCodeInc#8089)

chore: bump version to v1.78.0

* Get the model id property for a given provider (RooCodeInc#8009)

* Fix: Transform keybindings in nightly build to fix command+y shortcut (RooCodeInc#8070)

* fix: transform keybindings command references in nightly build

The keybindings section was not being transformed during the nightly build process, causing command+y keybinding to reference the wrong command name (roo-cline.addToContext instead of roo-code-nightly.addToContext).

- Added keybindings schema to types.ts
- Updated generatePackageJson to transform keybindings command references
- This ensures keybindings work correctly in the nightly build

* fix: only include keybindings in output when they exist

Updated generatePackageJson to conditionally add keybindings to avoid including undefined values in the generated package.json. Fixed eslint-disable comment placement.

---------

Co-authored-by: Roo Code <[email protected]>

* Add a list of sub-processors (RooCodeInc#8163)

* Add cookie policy (RooCodeInc#8165)

* ux: Redesigned Message Feed (RooCodeInc#7985)

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Co-authored-by: Matt Rubens <[email protected]>

* Merge branch 'main' of github.com:zgsm-ai/costrict into roo-to-main

* bug: Incorrect copy for "Run" command when approving execution (RooCodeInc#8179)

* test: set default language to English in prompt tests

* Supernova (RooCodeInc#8175)

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* chore: add changeset for v3.28.4 (RooCodeInc#8182)

* Changeset version bump (RooCodeInc#8183)

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* feat(chat): enhance user info display and file path highlighting

* fix: support dash prefix in parseMarkdownChecklist for todo lists (RooCodeInc#8055)

- Updated regex pattern to support optional dash prefix (e.g., "- [ ] Task")
- Added comprehensive test coverage for both formats
- Fixes issue where todo lists with dash prefixes were not being parsed correctly

Fixes RooCodeInc#8054

Co-authored-by: Roo Code <[email protected]>

* Updating the privacy policy to allow us to send occasional emails (RooCodeInc#8180)

* Updating the privacy policy to allow us to send onboarding and occasional marketing emails.

* docs: Clarified unsubscribe behavior and updated the Last Updated date

* docs: update Last Updated date in Privacy Policy page

* fix: apply tiered pricing for Gemini models via Vertex AI (RooCodeInc#8018)

* fix: apply tiered pricing for Gemini models via Vertex AI

- Modified calculateCost method to handle models where cacheReadsPrice is only defined in tiers
- Added comprehensive tests for Vertex AI tiered pricing calculation
- Fixes issue where local cost calculation always showed highest tier rates

Fixes RooCodeInc#8017

* Delete src/api/providers/__tests__/vertex-tiered-pricing.spec.ts

---------

Co-authored-by: Roo Code <[email protected]>
Co-authored-by: Daniel <[email protected]>

* update sambanova models (RooCodeInc#8186)

* update sambanova models

* fix typo

* Fix duplicate rehydrate during reasoning; centralize rehydrate and preserve cancel metadata (RooCodeInc#8171)

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* Wrap code blocks by default (RooCodeInc#8194)

* Merge remote-tracking branch 'upstream/main' into roo-to-main

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* Add an announcement for Supernova

* Remove duplicate keys

* refactor(chat): optimize ChatRow rendering and user info handling

* Release v3.28.5 (RooCodeInc#8198)

chore: add changeset for v3.28.5

* Changeset version bump (RooCodeInc#8199)

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* Remove language selection and word wrap toggle from CodeBlock (RooCodeInc#8208)

* feat: Add keyboard shortcut for toggling auto-approve (Cmd/Ctrl+Alt+A) (RooCodeInc#8214)

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* fix: prevent checkpoint text from wrapping in non-English languages (RooCodeInc#8207)

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* feat: add package.nls.json checking to find-missing-translations script (RooCodeInc#8255)

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* feat(types): add GPT-5-Codex model (RooCodeInc#8260)

* chore: add changeset for v3.28.6 (RooCodeInc#8261)

* Follow-up questions should trigger the "interactive" state (RooCodeInc#8259)

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* Changeset version bump (RooCodeInc#8262)

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* Add image for 3.28.5 (RooCodeInc#8266)

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* Cloud account switcher (RooCodeInc#8223)

* Cloud account switcher

* Bare metal evals fixes (RooCodeInc#8224)

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* Rounded icons in chat account switcher

* Visual tweaks to CloudView

* Remove hardcoded timeout

* Safer check

* PR feedback

* Fix test

* Check for org mismatches in handleCredentialsChange

* Cloud: use the existing auth event flow to handle org switching

* Cleanup: broadcast() might be confusingly named.

---------

Co-authored-by: Chris Estreich <[email protected]>
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* fix: checkpoint restore popover positioning issue (RooCodeInc#8219) (RooCodeInc#8220)

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* ux: Collapse thinking blocks by default (but control all of them with a keyboard shortcut) (RooCodeInc#8254)

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* Merge remote-tracking branch 'upstream/main' into roo-to-main

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* Set port 3446 for web-evals in production mode (RooCodeInc#8288)

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* fix: include initial ask in condense summarization (RooCodeInc#8293) (RooCodeInc#8298)

* fix: include initial ask in condense summarization (RooCodeInc#8293)

---------

Co-authored-by: Matt Rubens <[email protected]>

* Fix frequent "No tool used" errors by clarifying tool-use rules (RooCodeInc#8292)

* Add a couple more free models to the Roo provider (RooCodeInc#8304)

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* feat: log out from cloud when resetting extension state (RooCodeInc#8312)

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* Merge remote-tracking branch 'upstream/main' into roo-to-main

* feat: Add telemetry tracking to DismissibleUpsell component (RooCodeInc#8309)

* feat: add telemetry tracking to DismissibleUpsell component

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- Updated DismissibleUpsell component to track clicks and dismissals with telemetry
- Added telemetry tests to DismissibleUpsell test suite
- Events include upsellId in the payload for tracking specific upsells

* refactor(webview): make handleDismiss synchronous in DismissibleUpsell

test(webview): add scenario where dismissOnClick=true without onClick tracks only UPSELL_DISMISSED; update tests; all tests passing locally

---------

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* Correct tool use suggestion to improve model adherence to suggestion (RooCodeInc#8315)

* Correct tool use suggestion to improve model adherence to suggestion

* tweak

* removing user hint when refreshing models (RooCodeInc#7710)

* feat(zgsm): add quota info display and periodic updates

* Show the Roo provider on the welcome screen (RooCodeInc#8317)

* wip: Website Improvements (RooCodeInc#8303)

Co-authored-by: Matt Rubens <[email protected]>

* refactor: remove pr-reviewer mode (RooCodeInc#8222)

* feat: add animated quota display with staggered transitions

* Merge remote-tracking branch 'upstream/main' into roo-to-main

* web: More website copy tweaks (RooCodeInc#8326)

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* fix: remove <thinking> tags from prompts for cleaner output and fewer tokens (RooCodeInc#8319)

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* Upgrade Supernova (RooCodeInc#8330)

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* Track when telemetry settings change (RooCodeInc#8339)

* fix: use max_completion_tokens for GPT-5 models in LiteLLM provider (RooCodeInc#6980)

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* Make chat icons shrink-0 (RooCodeInc#8343)

* web: Testimonials (RooCodeInc#8360)

* Adds lots of testimonials, 5-stars from marketplace

* Fits more testimonials in one page

* Testimonial heading tweak

* ci: refresh contrib.rocks cache workflow (RooCodeInc#8083)

* feat: add Claude 4.5 Sonnet model across all providers (RooCodeInc#8368)

* chore: add changeset for v3.28.10 (RooCodeInc#8369)

* Changeset version bump (RooCodeInc#8370)

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
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* fix: correct AWS Bedrock Claude Sonnet 4.5 model identifier (RooCodeInc#8372)

Fixes RooCodeInc#8371 - Updates the model ID from anthropic.claude-4.5-sonnet-v1:0
to anthropic.claude-sonnet-4-5-20250929-v1:0 to match AWS Bedrock naming convention

Co-authored-by: Roo Code <[email protected]>

* fix: correct Claude Sonnet 4.5 model ID format (RooCodeInc#8373)

* chore: add changeset for v3.28.11 (RooCodeInc#8374)

* Changeset version bump (RooCodeInc#8375)

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Matt Rubens <[email protected]>

* fix: Anthropic Sonnet 4.5 model id + Bedrock 1M context checkbox (RooCodeInc#8384)

fix(anthropic): use claude-sonnet-4-5 id
fix(bedrock): enable 1M context checkbox for Sonnet 4.5 via shared list
closes RooCodeInc#8379
closes RooCodeInc#8381

* chore: add changeset for v3.28.12 (RooCodeInc#8385)

* Changeset version bump (RooCodeInc#8376)

* changeset version bump

* Revise changelog for version 3.28.12

Updated version number and consolidated patch notes.

---------

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Matt Rubens <[email protected]>

* Fix Vertex Sonnet 4.5 (RooCodeInc#8391)

* fix: remove topP parameter from Bedrock inference config (RooCodeInc#8388)

Co-authored-by: Matt Rubens <[email protected]>

* chore: add changeset for v3.28.13 (RooCodeInc#8393)

* Changeset version bump (RooCodeInc#8394)

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Matt Rubens <[email protected]>

* feat: add GLM-4.6 model support for z.ai provider (RooCodeInc#8408)

Co-authored-by: Roo Code <[email protected]>

* chore: add changeset for v3.28.14 (RooCodeInc#8413)

* Changeset version bump (RooCodeInc#8414)

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Matt Rubens <[email protected]>

* A couple more sonnet 4.5 fixes (RooCodeInc#8421)

* chore: Remove unsupported Gemini 2.5 Flash Image Preview free model (RooCodeInc#8359)

* Include reasoning messages in cloud tasks (RooCodeInc#8401)

* fix: show send button when only images are selected in chat textarea (RooCodeInc#8423)

Co-authored-by: Roo Code <[email protected]>
Co-authored-by: Matt Rubens <[email protected]>

* Add structured data to the homepage (RooCodeInc#8427)

Co-authored-by: roomote[bot] <219738659+roomote[bot]@users.noreply.github.com>

* fix(ui): disable send button when no input content and update tests

* fix: Addresses overeager 'there are unsaved changes' dialog in settings (RooCodeInc#8410)

Fixes overeager 'there are unsaved changes' dialog in settings

* feat: add UsageStats schema and type (RooCodeInc#8441)

feat: add UsageStats schema and type to cloud.ts

Co-authored-by: Roo Code <[email protected]>

* Release: v1.80.0 (RooCodeInc#8442)

chore: bump version to v1.80.0

* feat: add new DeepSeek and GLM models with detailed descriptions to the Chutes provider (RooCodeInc#8467)

* Deprecate free grok 4 fast (RooCodeInc#8481)

Co-authored-by: ellipsis-dev[bot] <65095814+ellipsis-dev[bot]@users.noreply.github.com>

* fix: improve save button activation in prompts settings (