[Feature]: Cache-preserving dynamic runtime updates
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Nobody has claimed this yet.
Assessment
- Difficulty
- 5/5
- Estimated time
- Over a week
- Newbie friendliness
- 35/100
- Issue type
- Feature
- Clarity
- Needs clarification
- Activity status
- Active
- Tech stack
- typescript
- Domain
- ai, cli, performance
Research direction
Start by tracing MCode’s existing prompt-cache awareness, context management, compaction, tools/MCPs, skills, and resumable-session entry points. Compare a small runtime change across supported and unsupported model/providers; done means stable cached context is reused where supported while unsupported providers retain current behavior.
Written by the indexing model from the issue text.
Description
Product or interface
CLI - interactive TUI
Use case and problem
Long-running MCode sessions change while they are already running: tools become relevant, instructions change, sessions resume, or context approaches compaction. Small runtime changes can force more prompt/tool state to be rebuilt or reprocessed than necessary, reducing prompt/KV-cache reuse and adding avoidable latency, token processing, and cost. The goal is to keep MCode’s behavior unchanged while making the runtime more cache-aware wherever the selected model/provider supports it.
Desired behavior
Allow MCode to preserve reusable cached context across small runtime changes: add/remove tools without unnecessarily losing the stable prompt prefix, introduce mid-conversation runtime instructions while preserving cache where supported, reuse or warm recent session context on resume, and let compaction/cache behavior adapt per model/provider. Unsupported providers should simply keep the current behavior.
Acceptance idea
existing cached session → small runtime change → reuse stable prefix → process only what changed
instead of:
existing session → small runtime change → rebuild/reprocess everything
Platform
Multiple platforms
Alternatives and additional context
Other agent harnesses are starting to expose ideas like dynamic tools without losing KV cache, mid-conversation system messages, cache warming, and faster resume. MCode already has prompt-cache awareness, context management, compaction, tools, MCPs, skills, and resumable sessions, so this feels like a natural next efficiency step rather than a change to how MCode fundamentally works.
- Dominant language
- TypeScript
- Stars
- 1.3k
- Forks
- 141
- Avg merge
- 3h 50m
- Merged PRs (30d)
- 102
Getting set up
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
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