[wagner-deoliveira]

Problem

The Claude provider guide has a "Compact long conversations" section, but the OpenCode guide never says where compaction is configured. T3 Code has no OpenCode compaction setting, so a user whose OpenCode thread compacts too early or loses detail has nothing in the docs to point them at OpenCode's own config.

Change

Adds a short "Compaction" section to docs/user/providers-opencode.md: compaction is OpenCode's own, the settings live under compaction in opencode.json (auto, buffer, keep.tokens), and /compact compacts a thread by hand. The settings are marked OpenCode 2 only.

Scope and approval

Docs only, one file, no behavior change. This is the discoverability case from CONTRIBUTING.md: an existing workflow (OpenCode's config) already covers the need, and the docs don't say so.

Verification

• Checked the three setting names, their meanings, and the V2-only scope against OpenCode's v2.2.0 compaction page, which states that its settings apply to V2 and that V1 used different pruning behavior.
• Checked that /compact is a built-in slash command for OpenCode in packages/provider-opencode/src/server/status.ts.
• I did not run the app or compact a real thread. I did not check OpenCode 1.x's settings, so the page only says they differ.

Written by Claude Sonnet 5.5 in Claude Code.

🤖 Generated with Claude Code

[macroscopeapp]

Approvability

Verdict: Approved at bca011a

Macroscope's review found this PR approvable — Documents where OpenCode compaction is configured and how to invoke it manually. The change is limited to documentation and does not alter runtime behavior or product defaults.

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Important

Review skipped

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Files selected for processing: 1

• docs/user/providers-opencode.md

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• docs/user/providers-opencode.md

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Walkthrough

The OpenCode provider guide now describes automatic compaction, version-specific configuration, and the /compact command for manual compaction.

Changes: OpenCode compaction documentation

Layer / File(s)	Summary
Document compaction behavior docs/user/providers-opencode.md	The guide describes OpenCode 2 compaction options, notes that OpenCode 1.x configures compaction differently, and documents /compact for manual compaction.

Priority: Low

Estimated code review effort: 1 (Trivial) | ~2 minutes

Change: Other

Possibly related issues

• [Bug]: OpenCode delegated task marked failed on context overflow, but the OpenCode session compacts and keeps running unsupervised #26674: The guide documents automatic compaction settings, but does not address failed-run or orphaned-session handling.
• OpenCode 2.1 compaction events are discarded, so the thread never shows compacting context #26193: The guide documents /compact and compaction configuration, but does not address the event-decoding failure.

Possibly related PRs

• pingdotgg/t3code#25404: This PR also changes OpenCode compaction behavior. Its proposed setting conflicts with the guide’s statement that T3 Code has no compaction setting.
• pingdotgg/t3code#24008: This PR changes how explicit /compact commands are handled, a command documented in this guide.

Suggested reviewers: juliusmarminge, macroscopeapp

Merge Risk: Minimal · previous review c9195

No actionable issue is established in the compaction guide; it is mergeable after normal documentation checks.

Pre-merge checks: 4

Check name	Status	Explanation
Title check		The title "docs(opencode): say where compaction is configured" matches the change. The PR adds a Compaction section to the OpenCode provider guide that names OpenCode's own config file as the place fo…
Description check		The description covers the problem, the change, scope and approval, and verification. The problem and change sections explain why the docs need the Compaction section and what it states. The scope sec…
Linked Issues check		Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check		Check skipped because no linked issues were found for this pull request.

Full details: Title check

Explanation

The title "docs(opencode): say where compaction is configured" matches the change. The PR adds a Compaction section to the OpenCode provider guide that names OpenCode's own config file as the place for compaction settings. The title is specific, follows conventional commit form, and is 50 characters long.

Full details: Description check

Explanation

The description covers the problem, the change, scope and approval, and verification. The problem and change sections explain why the docs need the Compaction section and what it states. The scope section cites the docs-only, discoverability case from CONTRIBUTING.md. The verification section lists the checks run against OpenCode's v2.2.0 docs and the /compact command, and it states what was not checked: the app was not run, a real thread was not compacted, and OpenCode 1.x settings were not verified. The description follows the template's sections and its requirement to state untested items. Its verification relies on documentation and code references, which fits a docs-only change.

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Actionable comments posted: 1

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Inline comments:
Review comments at @docs/user/providers-opencode.md:
- Line 28: Update the configuration reference in the OpenCode 2 instructions to
say “an OpenCode configuration file, such as opencode.json,” rather than
implying that compaction must be set in opencode.json.

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[maria-rcks]

Note

Written by gpt-6.1-sol on behalf of Maria

Verified in a real dev environment

verified unchanged head 5d726d9b253808916e830d49d9ebee6a7c203a30 on linux with the real dev server, repo playwright, and google chrome. this is a documentation change, so the baseline is missing guidance rather than a runtime regression: github/main at ce48e45900 has no compaction section. i ran main in a separate worktree and stopped its captured background process before starting the pr with the same isolated task state.

• created a real repository project and threads through the app. real codex gpt-6.1-sol turns passed on main and the pr.
• configured opencode 2.2.5 and selected localproxy/gpt-6.1-sol in the client. native /api/config returned the documented auto, buffer, and keep.tokens values.
• with auto: false, sent /compact from the composer. the client showed compaction, and native session history recorded status: completed, reason: manual, and a generated summary. the next turn recalled cobalt lantern 27614; the result persisted after reload.
• with auto: true, buffer: "99%", and keep.tokens: 1000, an existing session compacted automatically and recalled the phrase. native history recorded one completed compaction with reason: auto. changing only auto to false allowed another normal turn without increasing that count.
• switching to codex through the same client completed its context handoff and returned codex-neighbor-27614.

Not verified

native desktop/mobile clients, remote relay/tunnel connections, an external opencode server, opencode 1.x behavior, and exact retention quality in large conversations were not exercised. the deliberately aggressive automatic buffer hit opencode's Nothing to compact yet guard on a new session; the existing-session automatic check above passed. the first proxy attempt also failed with an incorrect local credential, which was corrected before verification.

all executed github ci checks passed; documentation-scoped build/web jobs were skipped. no source changes were needed, and no local test suite was run.