AI coding context window is full and the chat is slowing down

A full context window is a quality problem. The model is carrying too much state and too little certainty.

Short version: More context is not the same as clean context.

Why this hurts.

Compaction can be lossy, summaries can miss files, and long chats often preserve the wrong details.

How ShardStitch solves it.

01 / ShardStitch

Save the current working state

Record the active goal, stopping point, changed files, and next decision before replacing the full chat.

02 / ShardStitch

Preserve changed files and checks

Carry the working-tree diff, relevant paths, recent commits, and check results so the new session can inspect what changed.

03 / ShardStitch

Choose what crosses the boundary

Put task-critical files and constraints up front; retain deeper project context for follow-up rather than loading it all at once.

04 / ShardStitch

Verify the fresh session

Open a fresh session with the handoff, confirm the current branch and diff, then continue from the listed next action.

What the next AI receives.

  • Hot task context
  • Verified files
  • Important decisions
  • Next action

What stays out.

  • Cold history
  • Repeated explanations
  • Unneeded file dumps
  • Old attempts

Checkpoint before the context boundary

Before the context becomes unusable, check whether current edits are saved and inspect the branch and diff. Do not assume the model has written its latest proposal to disk.
Record the unfinished objective, constraints, last completed command, failed attempts, and the next check. Distinguish results from plans.
Carry a compact, task-specific handoff into a fresh session. Use a supported target format or paste the packet; neither path transfers unsaved files by itself.
Ask the fresh session to verify the checkout and summarize what remains before it edits. Re-run a relevant check if the working tree changed after the recorded result.

Context-window recovery checklist.

Inspect the current branch, working-tree status, and diff. Preserve uncommitted changes before starting fresh.
Record the exact files and commands checked. Separate checks that actually ran from checks still pending.
Carry forward decisions, constraints, failed attempts, and unresolved questions.
After compacting or restarting, compare the handoff with the repository before treating it as current.
Give the next session one verifiable next action.

FAQ.

Is compacting the chat or running /compact enough?

Not by itself. Compaction may preserve conversational continuity, but it does not independently verify the current diff, files, command results, or test status. Treat the compacted summary as a lead, then check those facts against the repository and recorded outputs.

Does a full context window mean my code changes are lost?

Not necessarily. Saved files and Git state may remain on disk, but unsaved model output or decisions held only in chat may be gone. Inspect the actual project before deciding what is recoverable.

Can I continue in the same AI tool after the limit clears?

Often the project state can be handed to a fresh session in the same tool, subject to the tool limits and supported pickup format. The handoff does not reset the provider quota.

Related pages.