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Implemented the next parity slice: prompt-budget preflight and context collapse.

Browse Source 
Core changes:

  - Added claw-code/src/token_budget.py for projected prompt size, chat-framing overhead, output reserve, and soft/hard input limits.
  - Wired preflight prompt-length validation and auto-compact/context collapse into claw-code/src/agent_runtime.py.
  - Extended claw-code/src/compact.py so compaction reports usage back to the runtime.
  - Added inspection surfaces in claw-code/src/agent_slash_commands.py and claw-code/src/main.py:
      - /token-budget and /budget
      - token-budget
  - Hardened claw-code/src/tokenizer_runtime.py so arbitrary simple model names fall back cleanly instead of trying a slow Transformers
    lookup.
  - Exported the new helpers in claw-code/src/__init__.py.

  Docs and tracking:

  - Updated claw-code/PARITY_CHECKLIST.md to mark prompt-length validation, token-budget calculation, and auto-compact/context collapse as
    done.
  - Updated claw-code/README.md and claw-code/TESTING_GUIDE.md with the new commands and behavior.

  Tests:

  - Added claw-code/tests/test_token_budget.py.
  - Updated claw-code/tests/test_agent_runtime.py, claw-code/tests/test_agent_slash_commands.py, claw-code/tests/test_main.py, and claw-code/
    tests/test_agent_context_usage.py.
  - Verified with:
      - /data/fs201059/aa17626/miniconda3/bin/python3 -m compileall src tests
      - /data/fs201059/aa17626/miniconda3/bin/python3 -m unittest -v tests.test_token_budget
        tests.test_agent_runtime.AgentRuntimeTests.test_agent_rejects_prompt_before_backend_when_preflight_input_budget_is_exceeded
        tests.test_agent_runtime.AgentRuntimeTests.test_agent_auto_compacts_context_before_next_model_call tests.test_agent_slash_commands
        tests.test_main tests.test_compact tests.test_tokenizer_runtime tests.test_agent_context_usage
      - Result: 71 tests, OK
This commit is contained in:
Abdelrahman Abdallah
2026-04-11 01:38:19 +02:00
parent aacf0a212a
commit b5e5824a56
23 changed files with 2641 additions and 10 deletions
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src/tokenizer_runtime.py
+10 -1
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@@ -156,7 +156,7 @@ def _try_build_transformers_counter(
model_ref: str | None,
trust_remote_code: str | None,
) -> ResolvedTokenCounter | None:
if model_ref is None:
if model_ref is None or not _should_try_transformers(model_ref):
return None
try:
from transformers import AutoTokenizer
@@ -196,6 +196,15 @@ def _try_build_transformers_counter(
)
def _should_try_transformers(model_ref: str) -> bool:
if os.path.exists(model_ref):
return True
normalized = model_ref.strip()
if not normalized:
return False
return '/' in normalized or '\\' in normalized
def _heuristic_count(text: str) -> int:
if not text:
return 0