# 07-restore-background <> Restore the previous unwarped background, but keep all current event timings, e3's second-channel lag, and the deletion of e4. Use the historical source as a reference and create a new checked revision, not a rollback that loses the event work. Compare the result against the revision just before the background warp and demonstrate equality over the whole hour. Show the current overview, and give a concise summary of what this conversation has preserved. <> Starting AI conversation Preparing context and tools. <> Planning tool use Next tool: `InspectFunctionStudy` <> Using InspectFunctionStudy {"revision":""} <> InspectFunctionStudy finished r8-e4aea058bc8b parent, description, durationSeconds, channels, events, choices, source, liveSourceHash, dirty, selectedIds, selectionSeconds, history, semantics images=0 <> Planning tool use Next tool: `InspectFunctionStudy` <> Using InspectFunctionStudy {"revision":"r7-ebc54198e3ae"} <> InspectFunctionStudy finished r7-ebc54198e3ae parent, description, durationSeconds, channels, events, choices, source, liveSourceHash, dirty, selectedIds, selectionSeconds, history, semantics images=0 <> Planning tool use Next tool: `ObserveFunctionStudy` <> Using ObserveFunctionStudy {"compareTo":"r7-ebc54198e3ae","endSeconds":1150,"revision":"r8-e4aea058bc8b","startSeconds":1125} <> ObserveFunctionStudy finished r8-e4aea058bc8b intervalSeconds, comparedTo, sourceHash, channels, events, choices, selectedIds, sampling, extrema, holdChecks, joins, difference, imageFile, guarantees, localPeaks images=1 <> Planning tool use Next tool: `EditFunctionStudy` <> Using EditFunctionStudy {"description":"Restore unwarped background using historical r7 source passage; new child of r8 preserving all current events, e3 y lag and e4 deletion; retain warp experiment in history.","expectedRevision":"r8-e4aea058bc8b","expectedSourceHash":"e4aea058bc8b7496a7f4c8856f8a4b23ebf7aa9c283bfa35aaaf48d235938152","source":"import afield.math.functions.Functions\nimport afield.math.functions.StudyComposition\nimport afield.math.functions.StudyEvent\nimport afield.math.functions.StudyChoice\nimport kotlin.math.PI\n\nwith(Functions) {\n val durationSeconds = 3600.0\n val carrierPeriodSeconds = 40.0\n val relativePhasePeriodSeconds = 100.0\n val phaseExcursionRadians = 2.0 * PI / 3.0\n val backgroundCenter = 0.45... <> EditFunctionStudy finished r9-82456e1e48ac Compiled, checked and activated images=0 <> Planning tool use Next tool: `CompileKotlinRequest` <> Using CompileKotlinRequest {"file":"afield://function_conversation/function_source/code","runSetupBlocks":false,"source":""} <> CompileKotlinRequest finished success=true diagnostics=0 setupChanges=0 <> Planning tool use Next tool: `CompareFunctionStudy` <> Using CompareFunctionStudy {"afterRevision":"r9-82456e1e48ac","allowedChannels":[],"beforeRevision":"r7-ebc54198e3ae","changedEndSeconds":0,"changedStartSeconds":0} <> CompareFunctionStudy finished r9-82456e1e48ac before, allowedIntervalSeconds, allowedChannels, preservedScope, changedEventIds, method images=0 <> Planning tool use Next tool: `ObserveFunctionStudy` <> Using ObserveFunctionStudy {"compareTo":"r7-ebc54198e3ae","endSeconds":3600,"revision":"r9-82456e1e48ac","startSeconds":0} <> ObserveFunctionStudy finished r9-82456e1e48ac intervalSeconds, comparedTo, sourceHash, channels, events, choices, selectedIds, sampling, extrema, holdChecks, joins, difference, imageFile, guarantees, localPeaks images=1 <> Planning tool use Next tool: `DocumentGuideReadRequest` <> Using DocumentGuideReadRequest {"lineCount":80,"path":"guides/working.md","startLine":107} <> DocumentGuideReadRequest finished Read [guides/working.md](field://guide/guides/working.md) lines 107–115 <> Planning tool use Next tool: `DocumentGuideAppendRequest` <> Using DocumentGuideAppendRequest {"path":"guides/working.md","revision":"11c6f0120cec3de59c6e122c19efbc7acfb9e84409be8a0677d58fe87f308cac","text":"\n## Unwarped background restored; event work preserved\n\n- Current working revision **r9-82456e1e48ac**, a new checked child of r8-e4aea058bc8b. Inspected historical r7-ebc54198e3ae and restored its direct `background(seconds, index)` evaluation, removing only the background warp constants/map. Current event declarations and evaluators were retained; historical warp choices are explicitly superseded by the restoration choice. No history was discarded.\n- CompareFunctionStudy against pre-warp r7 with **allowedChannels=[]**: whole-hour 0..3600 evaluation at <=20 ms plus declared ... <> DocumentGuideAppendRequest finished Saved [guides/working.md](field://guide/guides/working.md) <> _r8-e4aea058bc8b; 1125.0..1150.0 seconds. White=current; dashed grey=r7-ebc54198e3ae. Inspect local waveforms before judging pulse rate; wide views are min/max envelopes._ ![tool image](images/2891ac1006de87d6f7f1.png) <> _r9-82456e1e48ac; 0.0..3600.0 seconds. White=current; dashed grey=r7-ebc54198e3ae. Inspect local waveforms before judging pulse rate; wide views are min/max envelopes._ ![tool image](images/905c0e94b876ee385b7f.png) <> Restored the unwarped background in **r9-82456e1e48ac**, a new checked child of r8—not a rollback. I used historical **r7-ebc54198e3ae** to restore direct absolute-time background evaluation. ### Whole-hour equality Compared against pre-warp r7 with **no channels allowed to change**: - **180,001 samples per channel**, covering 0–3600 s at ≤20 ms spacing plus event joins. - **Maximum error: 0; RMS error: 0** for x, y, and z. - No event metadata differences. The overview above also overlays r7 exactly at the sampled points. Kotlin compilation passed. ### Preserved through this conversation - **e3:** start **1425 s**, 200-second rise, shared all-ones hold **1625–1655 s**, end **1755 s**. - **e3’s y lag:** 6-second peak, smoothly recovered by **1605 s**. - **e4 remains deleted**, revealing the continuing background. - **e1, e2, e5, e6** retain their timings and stable IDs. - All five **30-second holds** remain intact. - Revision history retains both the background-warp experiment and the version containing e4. Recorded in [working notes](field://guide/guides/working.md).