Contract with Compaction

examples/contract-compaction.toml enables governed compaction at the contract layer. This is default-off everywhere else; selecting summarize here affects only the projected context for this contract run.

truss --contract examples/contract-compaction.toml --tools

# Contract example showing governed compaction enabled at the contract layer.
# Run with: truss --contract examples/contract-compaction.toml --tools

reviewers = 1

[memory.compaction]
mode = "summarize"
threshold = 0.70
min_tail = 6
anticipate = false

[contract]
id = "demo-compaction-0001"
title = "Summarize at context pressure"
intent = """
Create a file named compaction-demo.txt in the working directory whose contents
are exactly the line: governed compaction is opt-in
"""

[[done]]
kind = "check"
desc = "compaction-demo.txt contains the expected line"
run = "cat compaction-demo.txt"
expect_exit = 0
expect_contains = ["governed compaction is opt-in"]

[budget]
max_cost_usd = 1.00
max_steps = 12

[constraints]
write_scope = ["."]
network = "none"
allow_tools = ["read_file", "write_file", "list_dir", "bash"]
forbidden = ["rm -rf /", "git push"]
system = "You are a careful engineer. Use the tools to complete the task, then stop."